Answer:
a) To calculate how much Vanessa will have to pay back after 2 years, we need to add the interest to the principal.
The interest can be calculated using the simple interest formula:
Interest = Principal x Rate x Time
where,
Principal = $5,000 (the amount borrowed)
Rate = 4% (expressed as a decimal, 0.04)
Time = 2 years
So,
Interest = $5,000 x 0.04 x 2
Interest = $400
The total amount Vanessa will have to pay back is the sum of the principal and the interest:
Total amount = Principal + Interest
Total amount = $5,000 + $400
Total amount = $5,400
Therefore, Vanessa will have to pay $5,400 after 2 years.
b) To calculate how much interest Vanessa will pay, we can use the same formula for simple interest:
Interest = Principal x Rate x Time
Plugging in the given values, we get:
Interest = $5,000 x 0.04 x 2
Interest = $400
Therefore, Vanessa will pay $400 in interest over the 2-year period.
Please help will mark Brainly
Answer:
[tex]\mathrm{D.\:\:\:f(x) = 2x^2 - 2x - 4; A = 8}[/tex]
Step-by-step explanation:
The formula for the area of a rectangle is A = l x w, where A is the area, l is the length, and w is the width. In this case, the length is 2x - 4 units and the width is x + 1 units. Therefore, the function that models the area of the rectangle is:
f(x) = (2x - 4)(x + 1)
f(x) = 2x^2 - 2x - 4
Therefore, option D is the correct answer.
To find the area when x = 3, we substitute x = 3 into the function:
f(3) = 2(3)^2 - 2(3) - 4
f(3) = 18 - 6 - 4
f(3) = 8
Therefore, when x = 3, the area of the rectangle is 8 square units.
Joanna went school supply shopping. She spent $23.89 on notebooks and pencils. Notebooks cost $1.87 each and pencils cost $1.08 each. She bought a total of 17 notebooks and pencils. How many of each did she buy?
Answer: She
bought a total of 5 notebooks and 13 pencils.
Step-by-step explanation:
x/15 = h make x the subject
Answer:
To make "x" the subject of the equation, we can isolate it on one side of the equation by multiplying both sides by 15:
x/15 = h
Multiplying both sides by 15 gives:
x = 15h
The equation in terms of "x" is x = 15h.
Step-by-step explanation:
A scientist compares the weights of strawberries from two different groups. The difference between the means of the weights for the two different groups is –10 grams. The scientist uses simulations to create a randomization distribution to try to determine the likelihood that the results happened by chance. The histogram represents the results of the 1,000 trials from the simulations.
Histogram. differences in means from random grouping.
According to the randomization distribution, is the difference in means due to chance or the group from which the measurements were made? Explain your reasoning.
Type your response in the space below.
A botanist is studying the research question, “Do seeds from a common plant take longer to germinate at 72 degrees Fahrenheit or at 75 degrees Fahrenheit?” They design an experiment in which they select 20 seeds and assign those seeds to 2 groups of 10 seeds each at random. The seeds in the first group are placed in an environment that is held at a constant temperature of 72 degrees Fahrenheit, and the seeds in the second group are placed in an environment that is held at a constant temperature of 75 degrees Fahrenheit. The germination times, in days, for each group are displayed in the table.
group 1 days to germinate group 2 days to germinate
14 14
14 13
14 14
13 14
13 13
14 13
15 14
14 14
14 15
15 13
The mean germination time for group 1 is 14 days, and the mean germination time for group 2 is 13.7 days.
a. How could the botanist get a randomization distribution to compare the two groups?
Type your response in the space below.
b. How would the botanist use the randomization distribution to determine whether the difference between the mean germination time for group 1 and the mean germination time for group 2 is due to chance?
Type your response in the space below.
Noah rolls a standard number cube 10 times and adds the values to get a sum of 28. Is that unusually low? Clare simulates rolling the number cube 10 times on a computer and adds the values. She repeats that process 100 times and creates a histogram of the results.
Histogram from 22 to 48 by 2’s. Sum of 10 rolls. Height of each bar is 1, 3, 4, 9, 9, 11, 16, 14, 12, 10, 5, 5, 1.
a. Based on the histogram, does 28 seem unusually low?
Select the correct choice.
A YesYes
B NoNo
Explain your reasoning.
Type your response in the space below.
b. The mean of Clare’s simulations is a sum of 35, and the standard deviation is 5.72. Using a normal distribution as an approximation of this distribution, what is the probability that a person would roll a sum less than 28? Round your answer to the nearest hundredth.
Type your answer in the box below.
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Answer: According to the histogram, a sum of 28 is not unusually low. The bar representing a sum of 28 has a height of 9, which is relatively high compared to some of the other bars. Additionally, the histogram is roughly symmetric, so a sum of 28 is not far from the mean of the distribution.
To find the probability that a person would roll a sum less than 28, we can standardize the value using the formula z = (x - mu) / sigma, where x is the sum of 28, mu is the mean of 35, and sigma is the standard deviation of 5.72.
z = (28 - 35) / 5.72 = -1.22
Using a standard normal distribution table or calculator, we can find that the probability of getting a z-score less than -1.22 is approximately 0.1112, or 11.12%. Therefore, there is about an 11.12% chance that a person would roll a sum less than 28.
Step-by-step explanation:
HOW TO TAKE OUT HCF BY PRIME FACTORISATION
Therefore , Highest Common Factor (HCF) of two or more numbers by prime factorisation method can be done by following below given steps
What is an unitary method?This generally recognized ease, preexisting variables, and any necessary elements from the initial Diocesan customizable query may all be used to complete the job. Consequently, you might be given another chance to use the item. Otherwise, important impacts on algorithmic statistics will vanish.
Here,
To find the Highest Common Factor (HCF) of two or more numbers by prime factorisation method, follow these steps:
Express each number as a product of prime factors.
Identify the common prime factors among the numbers.
Take the product of the common prime factors. This product will be the HCF of the given numbers.
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QUESTION 1 The number of elements in sets A and B are shown in Figure 1.0. If n(A) = n(B) find: (a) x (b) n(A) (c) n(B) (d) n(AUB) 2x 4xx+5 Figure 1.0 10 marks
Answer:
From the given figure, we can write the following equations:
n(A) = 2x + 4
n(B) = x + 5
n(A∪B) = n(A) + n(B) - n(A∩B)
Since we are given that n(A) = n(B), we can substitute the expressions for n(A) and n(B) to get:
2x + 4 = x + 5
x = 1
(a) x = 1
(b) n(A) = 2x + 4 = 2(1) + 4 = 6
(c) n(B) = x + 5 = 1 + 5 = 6
(d) n(A∪B) = n(A) + n(B) - n(A∩B)
We still need to find n(A∩B) to calculate n(A∪B). Looking at the figure, we can see that there are 2 elements that are common to both A and B. Therefore,
n(A∩B) = 2
Substituting this value, we get:
n(A∪B) = n(A) + n(B) - n(A∩B) = 6 + 6 - 2 = 10
Therefore, (d) n(A∪B) = 10.
Step-by-step explanation:
1.A trader sold some goods for #5184 and lost 4%. Find the total cost price of the goods?
Therefore, the total cost price of the goods is #5400.
What is cost price?Cost price refers to the amount of money that is spent by a business or individual to acquire or produce a product or service. It includes all the costs involved in the production or acquisition of the product or service, such as raw materials, labor costs, transportation costs, and other expenses. The cost price is usually used as a starting point for calculating the selling price of a product or service and is an important factor in determining the profitability of a business.
by the question.
Let's assume the cost price of the goods to be "x".
According to the problem, the trader sold the goods at a price of #5184 and incurred a loss of 4%.
we know that,
selling price = cost price - loss
Substituting the given values in the above formula, we get:
#5184 = x - 0.04x
Simplifying the equation, we get:
#5184 = 0.96x
Dividing both sides by 0.96, we get:
x = #5400
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At a recent baseball game of 5,000 in attendance, 150 people were asked what they prefer on a hot dog. The results are shown.
Ketchup Mustard Chili
63 27 60
Based on the data in this sample, how many of the people in attendance would prefer chili on a hot dog?
900
2,000
2,100
4,000
Answer:
The answer to your problem is, A. 900
Step-by-step explanation:
How we would need to find it:
To determine the number of people who would prefer mustard on a hot dog, we need to use the proportion of people in the sample who prefer mustard and apply it to the total number of people in attendance.
27/150 = 0.18
Next, estimate the number of people who prefer mustard in the entire population of 5,000 attendees we can multiply/x this proportion by the total number of attendees:
0.18 x 5,000 = 900
Thus the answer to your problem is, A. 900
Which expression does not have the same value as −2+3×65 ?
The expression that does not have the same value as -2 + 3×65 is 3×(65-2) which evaluates to 183, the correct option is D.
The expression -2 + 3×65 represents a mathematical calculation that involves the operations of addition and multiplication. The order of operations dictates that multiplication should be done before addition, so we start by multiplying 3 and 65 and then adding the result to -2.
The value of -2 + 3×65 is 193.
we need to evaluate each expression and compare it to 193.
Option A: 3×65 - 2 = 193
Option B: (3-2)×65 = 65
Option C: 65×3 - 2 = 193
Option D: 3×(65-2) = 183
expression that does not have the same value as -2 + 3×65 is option D: 3×(65-2) which evaluates to 183.
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The complete question is :
Which expression does not have the same value as −2+3×65?
Option A: 3×65 - 2 = 193
Option B: (3-2)×65 = 65
Option C: 65×3 - 2 = 193
Option D: 3×(65-2) = 183
The area of a rectangular room is 750 square feet. The width of the room is 5 feet less than the length of the room. Which equations can be used to solve for y, the length of the room? Select three options. y(y + 5) = 750 y2 – 5y = 750 750 – y(y – 5) = 0 y(y – 5) + 750 = 0 (y + 25)(y – 30) = 0
The equations that can be used to solve for y, the length of the room are: y² - 5y - 750 = 0 , (y - 30)(y + 25) = 0 , y(y - 5) + 750 = 0
Define the term equation?An equation is a mathematical statement that asserts the equality of two expressions, often with variables and constants.
To solve for y, we can use the same equation we used for x, since y represents the length of the room. Therefore, the equation we can use to solve for y is:
y² - 5y - 750 = 0
This equation can be factored as (y - 30)(y + 25) = 0, which gives us two solutions: y = 30 or y = -25. However, since the length of a room cannot be negative, the only valid solution is y = 30.
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I will mark you brainiest!
In completing the following proof, which of the following statements should be included?
Given: regular ΔDAF; midpoints B, C, E; ∠DBE ≅ ∠FCE
Prove: DB ≅ FC
A) CCPTC
B) CPCTC
C) CSATC
D) CASTC
Answer:
B) CPCTC (stands for Corresponding Parts of Congruent Triangles are Congruent) should be included in the proof. This statement is necessary to show that ΔDBE ≅ ΔFCE, which then allows us to conclude that DB ≅ FC.
Step-by-step explanation:
Determine the length of x in the triangle. Give your answer to two decimal places. Show the steps, please.
Answer:
35.09 units
Step-by-step explanation:
This is a right-angled triangle where:
Hypotenuse = x units
With respect to angle 20°:
Opposite = 12 units
Use trigonometric function sinФ to solve for x:
sinФ = [tex]\frac{Opposite}{Hypotenuse}[/tex]
∴sin20° = [tex]\frac{12}{x}[/tex]
Cross-multiplication is applied:
[tex](x)(sin20) = 12[/tex]
x has to be isolated and made the subject of the equation:
∴[tex]x = \frac{12}{sin20}[/tex]
x = 35.09 units (Rounded to 2 decimal places)
Answer:
The length of x is 35.09 units to two decimal places.
Step-by-step explanation:
In the given right triangle, we have been given the length of the side opposite the angle and need to find the length of the hypotenuse.
To find the value of x, use the sine trigonometric ratio.
[tex]\boxed{\begin{minipage}{9 cm}\underline{Sine trigonometric ratio} \\\\$\sf \sin(\theta)=\dfrac{O}{H}$\\\\where:\\ \phantom{ww}$\bullet$ $\theta$ is the angle. \\ \phantom{ww}$\bullet$ $\sf O$ is the side opposite the angle. \\\phantom{ww}$\bullet$ $\sf H$ is the hypotenuse (the side opposite the right angle). \\\end{minipage}}[/tex]
Substitute θ = 20°, O = 12 and H = x into the ratio and solve for x:
[tex]\implies \sin 20^{\circ}=\dfrac{12}{x}[/tex]
[tex]\implies x=\dfrac{12}{\sin 20^{\circ}}[/tex]
[tex]\implies x=35.085652...[/tex]
[tex]\implies x=35.09\; \sf (2\;d.p.)[/tex]
Therefore, the length of x is 35.09 units to two decimal places.
A school has 500 students. The principal is to pick 30 students at random from the school to go to the Rose Bowl. How can this be done using a random-number table?
The way the principal can use a random - number table to pick 30 students from the school is explained below.
How to use a random number table ?To use a random-number table to select 30 students at random from a school of 500 students, the principal should :
Assign a unique number from 1 to 500 to each student in the school.Choose a starting point on the random-number table and begin reading the digits in pairs from left to right.Ignore any pairs that are outside the range of 01 to 50 (since there are 50 students per page).Whenever the principal encounters a pair of digits that falls within the range of 01 to 50, record the corresponding student number.Repeat steps 3 and 4 until you have recorded 30 student numbers.Check that there are no duplicates in the list of selected students.This method ensures that every student has an equal chance of being selected.
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The density of the object is equal to the quotient of its mass, m, and its volume, v . An object has a density of 8 grams per liter and a volume of 16 liters. What is its mass in grams
Answer:
the formula for density is:
density = mass/volume
We know that the density of the object is 8 grams per liter, and its volume is 16 liters. We can use this information to solve for the mass:
density = mass/volume
8 g/L = mass/16 L
To solve for the mass, we can cross-multiply and simplify:
8 g/L * 16 L = mass
128 g = mass
Therefore, the mass of the object is 128 grams.
The table below shows Zoey's earnings on the job.
Time (hours)
Time (hours)
Earnings (dollars)
Earnings (dollars)
3
3
$
86.10
$86.10
11
11
$
315.70
$315.70
24
24
$
688.80
$688.80
What is the constant of proportionality between earnings and time in hours?
Answer: 11 and more
Step-by-step explanation:
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
The expression for the area of the shaded region in its simplest form is x² + 23x + 49.
What is the area of the rectangle?
To find the area of a rectangle, we multiply the length of the rectangle by the width of the rectangle.
The shaded area is the difference of the areas of the rectangle and the square.
Rectangle:
A₁ = (x + 10)(2x + 5) = 2x² + 5x + 20x + 50 = 2x² + 25x + 50
Square:
A₂ = (x + 1)² = x² + 2x + 1
Shaded region:
A₁ - A₂ = 2x² + 25x + 50 - (x² + 2x + 1)
= 2x² + 25x + 50 - x² - 2x - 1
= x² + 23x + 49
Hence, the expression for the area of the shaded region in its simplest form is x² + 23x + 49.
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Complete question:
Enter your answer and show all the steps that you use to solve this problem in the space provided.
A rectangle is shown with length x plus 10 and width 2 x plus 5. The inside of the rectangle is shaded other than an unshaded square with length x plus 1 and width x plus 1.
Write an expression for the area of the shaded region in its simplest form. Show all of your steps.
Latasha and Nathan both leave the coffee shop at the same time, but in opposite directions. If Nathan travels 8mph faster than Latasha and after 9 hours they are 288 miles apart , how fast is each traveling
Answer:
Let's use the formula:
distance = rate × time
Let's assume Latasha's rate of travel as "r". Then, Nathan's rate of travel would be "r + 8".
For Latasha:
distance = r × 9
For Nathan:
distance = (r + 8) × 9
According to the problem, the combined distance they traveled is 288 miles. So:
r × 9 + (r + 8) × 9 = 288
Simplifying the equation:
18r + 72 = 288
18r = 216
r = 12
So, Latasha's rate of travel is 12 mph, and Nathan's rate of travel is 20 mph (12 + 8).
Therefore, Latasha is traveling at 12 mph and Nathan is traveling at 20 mph.
5. Find the time in which the loan of N3,900 at the rate of 5% yields N585=
6 What time will the simple interest N70,000 at the rate of 7% be used
for a loan of N20,000.00=
7.If N300.00 amount to N390 at the rate of 3%. Find the time.=
8.The simple interest on N5600.00 in 1 year is N80.00, find the rate percent per annum=
9.What year will N5100 yield an interest of N170.00 at the rate of 2 1/2 per annum=
10.What rate per annum will N4,600 yield an interest of N230.00 for 2 years=
11. What time will N8100 yield an interest of N729 at the rate of 9% per annum=
12.Report from the bank says the interest on N2300 is N23.00 for 2 years find the rate of interest per annum.=
Answer:
5. To find the time in which the loan of N3,900 at the rate of 5% yields N585, we can use the formula for simple interest:
I = P * r * t
where I is the interest, P is the principal (the amount borrowed), r is the interest rate (as a decimal), and t is the time (in years).
Plugging in the given values, we get:
585 = 3900 * 0.05 * t
Solving for t, we get:
t = 3 years
Therefore, it will take 3 years for the loan to yield N585 in interest.
6. To find the time it will take for the simple interest on N70,000 at the rate of 7% to be N20,000, we can again use the formula for simple interest:
I = P * r * t
Plugging in the given values, we get:
20000 = 70000 * 0.07 * t
Solving for t, we get:
t = 4 years
Therefore, it will take 4 years for the simple interest on N70,000 at the rate of 7% to be N20,000.
7. To find the time it takes for N300 to amount to N390 at the rate of 3%, we can use the formula for compound interest:
A = P * (1 + r/n)^(n*t)
where A is the final amount, P is the principal (the initial amount), r is the interest rate (as a decimal), n is the number of times the interest is compounded per year, and t is the time (in years).
Plugging in the given values, we get:
390 = 300 * (1 + 0.03/1)^(1*t)
Simplifying, we get:
1.3^t = 1.3
Taking the logarithm of both sides, we get:
t = log(1.3) / log(1.3)
t ≈ 1.82
Therefore, it takes approximately 1.82 years for N300 to amount to N390 at the rate of 3%.
8. To find the rate percent per annum for a simple interest of N80 on N5600 in 1 year, we can use the formula for simple interest:
I = P * r * t
Plugging in the given values, we get:
80 = 5600 * r * 1
Solving for r, we get:
r = 0.0143 or 1.43%
Therefore, the rate percent per annum is 1.43%.
9. To find the year in which N5100 will yield an interest of N170 at the rate of 2 1/2 per annum, we can use the formula for simple interest:
I = P * r * t
Plugging in the given values, we get:
170 = 5100 * 0.025 * t
Solving for t, we get:
t = 2/3 years
Since the question asks for the year, we need to add 2/3 years to the current year. Assuming the current year is 2021, we get:
2021 + 2/3 ≈ 2022.67
Therefore, N5100 will yield an interest of N170 at the rate of 2 1/2 per annum in the year 2022.
10. To find the rate per annum at which N4,600 will yield an interest of N230 for 2 years, we can again use the formula for simple interest:
I = P * r * t
Plugging in the given values, we get:
230 = 4600 * r * 2
Solving for r, we get:
r = 0.025 or 2.5%
Therefore, the rate per annum is 2.5%.
11. To find the time it takes for N8100 to yield an interest of N729 at the rate of 9% per annum, we can use the formula for simple interest:
I = P * r * t
Plugging in the given values, we get:
729 = 8100 * 0.09 * t
Solving for t, we get:
t = 1 year
Therefore, it takes 1 year for N8100 to yield an interest of N729 at the rate of 9% per annum.
12. To find the rate of interest per annum for an interest of N23 on N2300 for 2 years, we can use the formula for simple interest:
I = P * r * t
Plugging in the given values, we get:
23 = 2300 * r * 2
Solving for r, we get:
r = 0.005 or 0.5%
Therefore, the rate of interest per annum is 0.5%.
How many times will Sarah have to deposit $300 every six months into her account at 4.5%
compounded semi-annually to save $10 000.00?
25.15
20.82
15.75
1458.90
With 4.5% compounded semi-annually, Sarah will need to make installments for roughly 20.82 years in order to save $10,000. Hence, 20.82 is the answer.
Is every two years or semiannually?
Simply said, semiannual refers to events that occur twice a year. A couple might commemorate their nuptials each two years, a corporation might hold workplace celebrations each two years, as well as a family might go on vacation each two years. Every two years, something that happens twice a year does.
We can utilize the calculation again for future value of an annuity to resolve this issue:
FV = P × ((1 + r/n) - 1) / (r/n)
Where:
FV = Future value
P = Periodic payment
r = Annual interest rate
n = Compounding cycles per year, number
t = Number of years
In this instance, Sarah plans to deposit $300 each six months in order to save $10,000. She will so be required to make two payments each year. P thus equals $300, n equals 2, r equals 0.045 (decimalized 4.5%), and FV equals $10,000. The number of years, t, needs to be solved for.
$10,000 = $300 × ((1 + 0.045/2) - 1) / (0.045/2)
When we simplify this equation, we obtain:
20 = (1 + 0.0225) - 1
21 = (1 + 0.0225)
Using both sides' natural logarithms:
ln(21) = ln((1 + 0.0225))
ln(21) = 2×t × ln(1 + 0.0225)
t = ln(21) / (2 × ln(1 + 0.0225))
t = 20.82
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I need help with please
Answer:
C
Step-by-step explanation:
You want to identify the set of ordered pairs corresponding to the given pattern definitions.
Start atThe x-pattern starts at 2.
The y-pattern starts at 0.
The first (x, y) ordered pair is (2, 0). This matches answer choice C.
__
Additional comment
The x-rule tells you the sequence is ...
2, 2+6 = 8, 8+6 = 14, 14+6 = 20 . . . . . {2, 8, 14, 20}
The y-rule tells you the sequence is ...
0, 0+5 = 5, 5+5 = 10, 10+5 = 15 . . . . . {0, 5, 10, 15}
Then the (x, y) pairs are ...
(2, 0), (8, 5), (14, 10), (20, 15)
Note that when X and Y are the variables involved, we conventionally use the ordered pair (x, y). When other variables are involved, the ordered pair may be different, not always alphabetic order.
Generally, the independent variable is listed first. Here, neither depends on the other, so that criterion does not apply. Listing X first here is also suggested by the fact that the X pattern rule is defined first.
Which statements are true? Select each correct answer. Responses 15m3−6m=3m(5m2−6m) 15 m cubed minus 6 m equals 3 m left parenthesis 5 m squared minus 6 m right parenthesis 40m6−4=4(10m6−1) 40 m begn power 6 end power minus 4 equals 4 left parenthesis 10 begin power 6 end power minus 1 right parenthesis 32m4+12m3=4m3(8m+3) 32 m begin power 4 end power plus 12 m cubed equals 4 m cubed left parenthesis 8 m plus 3 right parenthesis 6m2+18m=6m2(1+3m)
The true statement are:
A. 15m3-6m=3m(5m2-6m),
B. 40m6-4=4(10m6-1),
C. 6m2+18m=6m2(1+3m),
What are the true statement?15m3-6m=3m(5m2-6m) - This is true. Factoring out 3m from the terms on the left side gives 3m(5m2 - 2), which matches the right side.40m6-4=4(10m6-1) - This is true. Distributing 4 on the right side gives 4(10m6) - 4, which simplifies to the left side.6m2+18m=6m2(1+3m) - This is true. Factoring out 6m2 from the terms on the left side gives 6m2(1 + 3m), which matches the right side.32m4+12m3(8m+3) - This is not an equation or inequality, so it cannot be true or false.Therefore the correct option is A, B, C.
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The correct question is:
Which statements are true
15m3-6m=3m(5m2-6m),
40m6-4=4(10m6-1),
6m2+18m=6m2(1+3m),
32m4+12m3(8m+3)
345.61489 rounded to the nearest ten- thousandth
Answer: 345.6149
Step-by-step explanation:
Answer:
345.6149
Step-by-step explanation:
The price of an item has dropped to $44 today. Yesterday it was $80. Find the percentage decrease
Answer:
To find the percentage decrease, we need to find the difference between the original price and the new price, divide that difference by the original price, and then multiply by 100 to get the percentage.
The difference between the original price and the new price is:
80 - 44 = 36
To find the percentage decrease, we divide this difference by the original price:
36 / 80 = 0.45
Finally, we multiply by 100 to get the percentage:
0.45 * 100 = 45%
Therefore, the percentage decrease from $80 to $44 is 45%.
Answer: The percentage decrease is 45%.
Step-by-step explanation:
Percentage decrease = [tex](\frac{Oringinal Value-NewValue}{Oringinal Value} )*100[/tex]
= [tex](\frac{80-44}{80} )*100[/tex]
= 45%
8. Effect size - Cohen's d and r squared An industrial/organizational psychologist has been consulting with a company that runs weekend job-seeking workshops for the unemployed. She collected data on several issues related to these workshops and, after conducting statistical tests, obtained statistically significant findings. She needs to find a way to evaluate effect size so that she can make recommendations to the company. One of the psychologist’s findings is that one year after the workshop, a sample of 49 job seekers who received training on setting career goals scored an average of 6.5 as measured on a 9-point job-search satisfaction scale, with a standard deviation of 1.2. The typical job seeker scores 5.8 points. The psychologist finds that the estimated Cohen’s d is , the t statistic is 4.12, and r² is . Using Cohen’s d and Cohen’s guidelines for interpreting the effect size with the estimated Cohen’s d, there is a treatment effect. Using r² and the extension of Cohen’s guidelines for interpreting the effect size using r², there is a treatment effect. (Hint: When using Cohen’s guidelines for interpreting the effect size, if the value lies between two categories, then specify the range covered by both categories, for example, medium to large.) Another one of the psychologist’s findings is that a sample of 144 job seekers who received training on identifying marketable skills worked more than 30 hours an average of 6.9 months in the last year, with a standard deviation of 2.5. The typical job seeker works 6.4 months. She finds that the estimated Cohen’s d is , the t statistic is 2.38, and r² is . Using Cohen’s d and Cohen’s guidelines for interpreting the effect size with the estimated Cohen’s d, there is a treatment effect. Using r² and the extension of Cohen’s guidelines for interpreting the effect size with r², there is a treatment effect.
For the first finding on job-search satisfaction scale, the estimated Cohen’s d is not provided in the question. However, assuming that it is provided in the actual data, the psychologist can use Cohen’s guidelines for interpreting the effect size based on the estimated Cohen’s d. According to Cohen’s guidelines, an effect size of 0.2 is considered small, 0.5 is considered medium, and 0.8 or higher is considered large. Therefore, the psychologist needs to compare the estimated Cohen’s d with these values to evaluate the effect size.
For the second finding on the number of months worked in the last year, the estimated Cohen’s d is also not provided in the question. The psychologist can use the same approach to evaluate the effect size using Cohen’s guidelines based on the estimated Cohen’s d.
Alternatively, the psychologist can also use r² as a measure of effect size. R² represents the proportion of variance in the outcome variable that is explained by the treatment or intervention. According to Cohen’s guidelines for r², an effect size of 0.01 is considered small, 0.09 is considered medium, and 0.25 or higher is considered large. Therefore, the psychologist can compare the estimated r² with these values to evaluate the effect size.
Based on the information provided, both findings show statistically significant results with treatment effects. However, the actual effect sizes cannot be evaluated without the estimated Cohen’s d or r² values.
Effect size for job-search satisfaction is Cohen's d = 0.7, t statistic = 4.12 and r² = 0.49.
According to Cohen's guidelines, a Cohen's d of 0.7 is considered a large effect size. This means that the workshop had a significant impact on the job-search satisfaction of the participants. The t statistic of 4.12 is also significant, indicating that the difference between the workshop participants and the control group is unlikely to have occurred by chance. The r² of 0.49 indicates that the workshop accounted for 49% of the variance in job-search satisfaction.
Effect size for months worked
Cohen's d = 0.36
t statistic = 2.38
r² = 0.13
According to Cohen's guidelines, a Cohen's d of 0.36 is considered a medium effect size. This means that the workshop had a significant impact on the number of months worked by the participants. The t statistic of 2.38 is also significant, indicating that the difference between the workshop participants and the control group is unlikely to have occurred by chance. The r² of 0.13 indicates that the workshop accounted for 13% of the variance in months worked.
Interpretation
Both of the effect sizes found by the psychologist are significant, indicating that the workshops had a positive impact on the job-search satisfaction and the number of months worked by the participants. The effect size for job-search satisfaction is larger than the effect size for months worked, suggesting that the workshop had a greater impact on job-search satisfaction than on the number of months worked.
Conclusion
The psychologist's findings suggest that the workshops had a positive impact on the job-search satisfaction and the number of months worked by the participants. The effect sizes for both outcomes are significant, and the effect size for job-search satisfaction is larger than the effect size for months worked. These findings suggest that the workshops may be an effective way to help unemployed people find jobs.
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Jayden throws a ball up in the air. The graph below shows the height of the ball h in feet after t seconds. Find the interval for which the ball's height is increasing.
The intervals during which the ball's height is increasing are: [0, 2.5] and
[5, 7.5]
What is an intervals?In a graph, an interval represents a range of values along the x-axis or y-axis. It is a continuous segment of the axis between two points, often used to indicate a particular range of values or a specific time period.
Since the graph represents the height of the ball h in feet after t seconds, we can find the interval during which the ball's height is increasing by examining the slope of the graph.
If the slope of the graph is positive, the height of the ball is increasing. If the slope is negative, the height of the ball is decreasing.
Looking at the graph, we can see that the slope of the graph is positive between approximately 0 and 2.5 seconds, and between approximately 5 and 7.5 seconds.
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Suppose the demand and supply of beer are modeled by the two following functions:
Q = -57P + 364
Q = 25P + 26
What is the equilibrium quantity of beer? Round your answer to two places after the decimal point (0.01).
Therefore , the solution of the given problem of unitary method comes out to be $240 which will cover the cost of the new motorbike.
What is an unitary method?The task can be completed by multiplying the data gathered using this type of nanosection along with two individuals variable who utilized the unilateral strategy. In essence, this signifies that perhaps the designated entity is defined or the colour of both mass production is skipped whenever a wanted item occurs. For forty pens, a variable charge of Inr ($1.01) could have been required.
Here,
The quantity supplied and the quantity requested are equal when there is equilibrium. As a result, we can equalise the two formulae and find the equilibrium quantity:
=> -57P + 364 = 25P + 26
=> 82P = 338
=> P = 4.12
We can use either equation to determine the equilibrium amount now that we know the equilibrium price. Use the supply calculation as an example:
=> Q = 25P + 26
=> Q = 25(4.12) + 26
=> Q = 129.5
So, rounded to two decimal places, the equilibrium amount of beer is roughly 129.5.
=> $60 + $180 = $240
which will cover the cost of the new motorbike.
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Lost-time accidents occur in a company at a mean rate of 0.4 per day. What is the probability that the number of lost-time accidents occurring over a period of 9 days will be at least 4 ? Round your answer to four decimal places.
The prοbability οf that the number οf lοst-time accidents οccurring οver a periοd οf 9 days will be at least 4 is 0.3975.
What is prοbability?Prοbability is a way οf calculating hοw likely sοmething is tο happen. It is difficult tο prοvide a cοmplete predictiοn fοr many events. Using it, we can οnly fοrecast the prοbability, οr likelihοοd, οf an event οccurring. The prοbability might be between 0 and 1, where 0 denοtes an impοssibility and 1 denοtes a certainty.
We can use here Pοisson distribution with λ=0.4 * 8=3.2
[tex]P[X\geq 4]=1-P[X < 4][/tex]
[tex]=1-{P[X=0] + P[X=1] + P[X=2] +P[X=3] =1-{0.0408+ 0.1304+ 0.2087 + 0.2226} =0.3975[/tex]
Where,
[tex]P[X=0]=\frac{e^{-3.2}(3.2)^0}{0!} = 0.0408[/tex]
[tex]P[X=1]=\frac{e^{-3.2}(3.2)^1}{1!} = 0.1304[/tex]
[tex]P[X=2]=\frac{e^{-3.2}(3.2)^2}{2!} = 0.2087[/tex]
[tex]P[X=3]=\frac{e^{-3.2}(3.2)^3}{3!} = 0.2226[/tex]
Hence the prοbability of that the number of lost-time accidents οccurring over a period of 9 days will be at least 4 is 0.3975.
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1, a 36 foot tree cast an 18 foot Shadow at the
Same time that a mail box carts a 4 foot shadow
how tall is the mail box
Answer:
We can use the concept of proportions to solve this problem. We know that the ratio of the height of the tree to the length of its shadow is the same as the ratio of the height of the mailbox to the length of its shadow.
Let's call the height of the mailbox "x". Then, we can set up the proportion:
height of tree / length of tree's shadow = height of mailbox / length of mailbox's shadow
Plugging in the values we know, we get:
36 / 18 = x / 4
Simplifying the left side of the equation, we get:
2 = x / 4
To solve for x, we can multiply both sides of the equation by 4:
8 = x
Therefore, the mailbox is 8 feet tall.
Step-by-step explanation:
Answer:
Height of mail box = 8 ft
Step-by-step explanation:
Given information,
→ 18 ft shadow is formed by a 36 ft tree.
→ A mail box casts 4 foot shadow.
Now we have to,
→ Find the height of the mail box.
Let us assume that,
→ Height of mail box = h
Forming the equation,
→ 36/18 = h/4
Then the value of h will be,
→ 36/18 = h/4
→ h/4 = 36/18
→ h/4 = 2
→ h = 2 × 4
→ [ h = 8 ft ]
Hence, the value of h is 8.
!!! Please quickly need an answer!!!!
Car A and car B set off from the same point to travel the same journey. Car A sets off three minutes before car B. If car A travels at 60 km/h and car B travels at 70 km/h, how many kilometres from the starting point will the two cars draw level?
The two cars will draw level at a distance of 12 kilometers from the starting point, taking their speed and into consideration, as further explained below.
How to find the distanceSince both cars are traveling towards the same destination, the distance between them will decrease over time until they draw level. Let's call the distance between the starting point and the meeting point "d" kilometers. We can use the formula:
distance = rate × time
Since car A has a three-minute head start, car B will have to travel for three minutes less than car A. Let's call the time it takes for car B to catch up to car A "t" hours. Then:
time for car A = t + 3/60 hours
time for car B = t hours
We want to find the distance between the starting point and the meeting point, which is the same for both cars. So we can set up an equation based on their distances:
distance traveled by car A = distance traveled by car B
(rate for car A) × (time for car A) = (rate for car B) × (time for car B)
60 × (t + 3/60) = 70 × t
3 = 10t
t = 3/10 hours
Now that we know the time it takes for car B to catch up to car A, we can use either car's rate and time to find the distance between the starting point and the meeting point. Let's use car A's rate and time:
distance = rate × time
distance = 60 × (t + 3/60)
distance = 60 × (3/10 + 1/20)
distance = 60 × (4/20)
distance = 12 kilometers
Therefore, the two cars will meet 12 kilometers from the starting point.
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PLEASE HELP!!!
Consider this equation. cos ( θ ) = 8/9 If θ is an angle in quadrant IV, what is the value of tan ( θ ) ?
let's keep in mind that in the IV Quadrant, the cosine is positive whilst the sine is negative, so hmm
[tex]\cos(\theta )=\cfrac{\stackrel{adjacent}{8}}{\underset{hypotenuse}{9}} \qquad \textit{let's find the \underline{opposite side}} \\\\\\ \begin{array}{llll} \textit{using the pythagorean theorem} \\\\ a^2+o^2=c^2\implies o=\sqrt{c^2 - a^2} \end{array} \qquad \begin{cases} c=\stackrel{hypotenuse}{9}\\ a=\stackrel{adjacent}{8}\\ o=opposite \end{cases}[/tex]
[tex]o=\pm\sqrt{ 9^2 - 8^2}\implies o=\pm\sqrt{ 81 - 64 } \implies o=\pm\sqrt{ 17 }\implies \stackrel{ IV~Quadrant }{o=-\sqrt{17}} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \tan(\theta )=\cfrac{\stackrel{opposite}{-\sqrt{17}}}{\underset{adjacent}{8}}~\hfill[/tex]
To find the value of tan(θ) when cos(θ) = 8/9 and θ is in the fourth quadrant, use the relation sin^2(θ) = 1 - cos^2(θ) to determine sin(θ). Then compute tan(θ) = sin(θ) / cos(θ). The result will be negative
Explanation:Given the equation cos(θ) = 8/9 in the fourth quadrant of the Cartesian plane, you are required to determine the value of tan(θ). In the fourth quadrant, cosine values are positive, and sine values are negative. You can use the relation sin^2(θ) = 1 - cos^2(θ). So, sin(θ) would be -sqrt(1 - (8/9)^2). The tangent of an angle in any quadrant can be found by taking the ratio of the sine to the cosine, i.e., tan(θ) = sin(θ) / cos(θ). Substitute the values of sine and cosine to find the value of tan(θ). It turns out that tan(θ) will be negative in the fourth quadrant.
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