Given that the pay was $44,000 last year and $53,000 this year, the compensation will have increased by 20.45%.
What is percent?In essence, percentages are fractions with a 100 as the denominator. We place the percent sign (%) next to the number to indicate that the number is a percentage. For instance, you would have received a 75% grade if you answered 75 out of 100 questions correctly on a test (75/100). Percentage is defined as "out of 100." Similar to fractions and decimals, percentages are used in mathematics to represent subsets of a whole. When expressing a sum as a percentage, 100 equal parts are considered to make up the whole.
Here,
Salary of staff last year=$44,000
Salary of staff this year=$53,000
The percent increase,
=(53000-44000)/44000*100
=20.45%
The percent increase in the salary will be 20.45% as the salary last year was $44,000 and the salary this year is $53,000.
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A very large study showed that aspirin reduced the rate of first heart attacks by %. A pharmaceutical company thinks they have a drug that will be more effective than aspirin, and plans to do a randomized clinical trial to test the new drug. What is the null hypothesis the company will use?.
the null hypothesis the company will use p =0.44.
What is z test?
If the data is distributed normally, a z test can be used to determine whether the means of two populations differ from one another. The z test statistic's value must be determined, together with the null hypothesis and alternative hypothesis setups, for this reason. On the z critical value, the decision criterion is based. The distribution graph is divided into acceptance and rejection zones during hypothesis testing by the z critical value. The null hypothesis can be rejected if the test statistic lies inside the rejection region; otherwise, it cannot.
Here the data is normally distributed and using the sample mean.
This is the right-tailed test.
The null hypothesis is
H0 : p =0.44
Hence, the null hypothesis the company will use p =0.44.
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Which expression would be easier to simplify if you used the associative property to change the grouping?
The expression that would be easier to simplify if you used the associative property to change the grouping is D. (160 + 40) + 27.
What is the associative property?The associative property of some binary operations in mathematics means that rearranging the parentheses in an expression will not change the result. Associativity is a valid rule of replacement for expressions in logical proofs in propositional logic.
This law simply states that when adding and multiplying numbers, you can change the grouping of the numbers in the problem and the answer will not change.
Addition and multiplication are both affected by the associative property. The reason for this is that you are combining numbers to get a total in both of these operations. You are combining values with addition. It makes no difference how you group these to put them together. The associative property of addition states that the addends can be grouped in various ways without changing the outcome.
In this case, (160 + 40) + 27 can simply be (40 + 160) + 27.
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Pressley is working two part-time jobs. He makes $18 per hour lifeguarding and $12 per
hour as a cashier at the local grocery store. During spring break from school, he worked
twice as many hours lifeguarding as he did at the local grocery store and earned $144.
How many hours did he work at each job?
Answer: He spent 3 hours as a cashier and 6 hours as a lifeguard
Step-by-step explanation:
First, you figure out his time as a cashier; 12($ per hour) x 3(hours working) = $36. Then, since it states he spent twice as many hours being a lifeguard, you double his hours when figuring out his time as a lifeguard; 18($ per hour) x 6(hours working) = $108. Add up both of your totals, $108 + $36 = $144.
at what rate per annum should p2400 be invested so that it will earn an interest of p800 in 8 years?
The interest rate is 4.17%, according to the question.
What do you mean by interest rate?
An amount that a borrower must pay to a lender as interest during the course of a loan, stated as a percentage of the loan amount is called interest rate.
According to data in the given question,
We have the given values:
Amount to be invested/Principal: 2,400
Amount of Interest: 800
Time: 8 years
Now, we will calculate the rate,
Solve for the rate:
Interest = Principal × Rate × Time
Derive the equation for rate:
Rate = [Interest ÷ (Principal × Time)] × 100
Substitute the given values:
Rate = [800 ÷ (2,400 × 8)] × 100
Rate = [800 ÷ 19,200] × 100
Rate = 0.04167 × 100
Rate = 4.17 %
Therefore, the rate is 4.17%.
Check:
800 = 2,400 × 8 × 0.04167
800 = 800.064
800 = 800
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Help me on these please!. Thank you whoever. 13 points!!
Answer:
1. $105
2. $144
Step-by-step explanation:
For the first question:
4.20 × 25 = 105
For the second question:
4.80 × 30 = 144
Could you please give me brainliest for this? Thank you!
Write an equation in point-slope form for the line that passes through the point with the given slope. (–2, 11).m=4/3
Answer:
y
+
2
=
3
4
(
x
−
11
)
Explanation:
Point slope form is given by the following formula:
y
−
y
1
=
m
(
x
−
x
1
)
In order to use the point slope formula we need two things:
1. The slope or
m
which in this case is
4
3
2. A point on the graph which we are given
(
−
2
,
11
)
Along with the slope, if we let
(
−
2
,
11
)
→
(
x
1
,
y
1
)
we can substitute all this information into the point-slope formula:
y
−
−
2
=
3
4
(
x
−
11
)
Simplify:
y
+
2
=
3
4
(
x
−
11
)
hope I helped you:)
Determine the amount of potential energy of a 5. 0-n book that is moved to three different shelves on a bookcase. The height of each shelf is 1. 0 m, 1. 5 m, and 2. 0 m.
The potential energy of book at heights 1m, 1.5m and 2m are 5J, 7.5J and 10J respectively.
Given,
weight of book =5
Heights of shelves are 1m, 1.5m and 2m
Potential energy can be determined by using formula, E=m*g*h
where, m*g is weight and h is height
amount of potential energy,
at height=1m
E=5*1=5 J
at height=1.5m
E=5*1.5=7.5J
at height=2m
E=5*2=10J
Thus, the potential energy of book at heights 1m, 1.5m and 2m are 5J, 7.5J and 10J respectively.
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Please help! I need credit to graduate
The annual percentage rate (APR) for this loan is equal to 412.7%.
What is APR?
APR is an abbreviation for annual percentage rate and it can be defined as a measure of an amount of money based on a yearly rate of interest, which a borrower must pay on a loan or credit card.
Mathematically, the annual percentage rate (APR) of a loan can be calculated by using this formula:
APR = [((simple interest/principal)/n) × 365] × 100
Where:
n represents the number of days.
Note: n is equal to 14 days (2 weeks).
Substituting the given parameters into the formula, we have;
APR = [((95/600)/n) × 365] × 100
APR = 0.01130 × 36500
APR = 412.7%.
the answer should be $568
Step-by-step explanation:
1. If AABC is an equilateral triangle, solve for both x and y.
B
A...
3x + 1
18y-41
49 m
Solving for Sides with OOGEE
A
C
Ind
2. If ARST is an equilateral triangle, find x and the measure of each side
its the second oneee
suppose a license plate that has 2 length of 7 characters can only contain digits and upper-case vowels and must contain at least one digit and at least one vowel. how many different legitimate license plates are available?
The total number of possible legitimate license plate numbers possible are (15)⁵.
The license plate has a length of 7 character for the legitimate license plates.
So, there are a total 7 position, in these positions, on has to be a upper case vowel and one has to be an integer digit.
Now, we have only 5 position are left.
There are only 5 vowels and 10 integers digits.
So, we are assuming that the repetition is allowed because nothing else is mentioned.
So, total possible combinations are 1 x 1 x 15 x 15 x 15 x 15 x 15.
Because repetition is allowed, we don't have to consider the factor of internal arrangement.
So, the total number of legitimate license plates possible are (15)⁵.
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A function f (x) is graphed on the coordinate plane. What is the function rule in slope-intercept form? Afunction f (>) is graphed on the coordinate plane What is the function rule in slope-intercept fom? Enter your answer in the box f(r) Basic x2
The required function of the line would be y = 2x + 1.
Function rule in slope-intercept form:The slope-intercept form is one rule to represent linear function rules.
f(x) = mx+b is sometimes used. In any scenario, m and b describe the line's overall features. The slope is denoted by m, while the y-intercept is denoted by b.
Linear equations, or straight-line equations, can be quickly recognized as they have no terms with exponents in them. For example, you will find an x or a y , but never an x². Each linear equation describes a straight line, which can be expressed using the slope intercept form equation.
According to the given question,
The coordinates of the y-intercept would be (0, 1).
The value of the x-coordinate is 1 when y-coordinate is 3.
Here the line passes through points (0, 1) and (1, 3).
Let the required linear function would be
y - y₁ = (y₂ - y₁)/(x₂ -x₁ )[x₂ -x]
x₁ = 0, y₁ = 1
x₂ = 1, y₂ = 3
⇒ y - y₂ = (y₂ - y₁)/(x₂ -x₁ )[x -x₂]
⇒ y - 3 = (3 - 1)/(1 - 0 )[x -1]
⇒ y - 3 = (2)[x -1]
⇒ y - 3 = 2x - 2
⇒ y = 2x - 2 + 3
⇒ y = 2x + 1
Therefore, the required function of the line would be y = 2x + 1 which is shown in the given question.
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The values for random variables in a Monte Carlo simulation are
a. selected manually.
b. generated randomly from probability distributions.
c. taken from forecasting analysis.
d. derived secondarily using formulas.
The correct option is (B) generated randomly from probability distributions.
The values for random variables in a Monte Carlo simulation are generated randomly from probability distributions.
A frequency distribution that has been idealized is a probability distribution. An individual sample or dataset is described by its frequency distribution. It's the number of times in the dataset that each possible value of a variable appears. The probability of occurrence of a value determines how frequently it appears in a sample.
A random variable can have any number of alternative values and likelihoods within a particular range, and a probability distribution is a statistical function that captures all of these possibilities. This range will be constrained by the minimum and maximum possible values, but the location of the possible value on the probability distribution will rely on a number of other variables.
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a confidence interval for a population mean has a margin of error of 6.4. determine the length of the confidence interval.
the length of the confidence interval is 12.8
What 95% confidence interval means?You have a 5% chance of being incorrect with a 95% confidence interval. You have a 10% chance of being incorrect with a 90% confidence interval. A 95% confidence interval is narrower than a 99% confidence interval.
How do you interpret a confidence interval?The likely location of the population parameter is shown by a confidence interval. For instance, the population mean is between 9 and 11, according to the 95% confidence interval of the mean [9 11].
According to the question,
Length of confidence interval = 2*(6.4)
Length of confidence interval = 12.8
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3 times a number is 28 less than the square of that number. Find the negative solution.
The solution that is "3 times a number is 28 less than the square of that number" in the negative is -4.
What is polynomial?A polynomial is a mathematical statement made up of coefficients and indeterminates that uses only the operations addition, subtraction, multiplication, and powers of positive integers of the variables. x2 4x + 7 is an illustration of a polynomial with a single indeterminate x. Sums of terms of the form kxn, where k is any number and n is a positive integer, make up polynomials. For instance, the polynomial 3x+2x-5. a description of polynomials. The concepts degree, standard form, monomial, binomial, and trinomial are all covered in this video.
Here,
Let the number be n.
3n=n²-28
n²-3n-28=0
n²-7n+4n-28=0
n(n-7)+4(n-7)=0
(n+4)(n-7)=0
n=-4,7
The negative solution to the number that is "3 times a number is 28 less than the square of that number" is -4.
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Answer:
-4 is correct
Step-by-step explanation:
Got it correct on delta 2023
the u.s. energy information administration claimed that u.s. residential customers used an average of 10,400 kilowatt hours (kwh) of electricity this year. a local power company believes that residents in their area use more electricity on average than eia's reported average. to test their claim, the company chooses a random sample of 163 of their customers and calculates that these customers used an average of 10,782kwh of electricity last year. assuming that the population standard deviation is 2768kwh, is there sufficient evidence to support the power company's claim at the 0.01 level of significance?
There is not sufficient evidence to support the power company's claim.
According to the information given in the question, we can frame the hypothesis as follows-
Null hypothesis ⇒ : H = 10400
Alternate hypothesis ⇒ Ha: > 10400
This is the right-tailed test.
Test statistic = z
[(x - μ)√n]/ σ
where x ⇒ sample mean = 10,782
σ ⇒ standard deviation = 2768
= (10782 - 10400)√163/ (2768)
= 382* 12.76/(2768)
= 1.76
⇒ Test statistic z = 1.76
Now, P( z > 1.76) = 1 - P( z < 1.76)
= 1 - 0.9608
= 0.0392
using z tables-
p-value = 0.0392
a = 0.01
we see that p-value > a
Thus, we fail to reject our null hypothesis.
Therefore, there is not sufficient evidence to support the power company's claim.
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Preceding the attack at the Somme on July 1, 1916, the British bombarded the German trenches for eight days. Some 1,537 British guns fired 1,723,873 rounds without letting up. In round figures, what was the average number of rounds fired each day? _________ What was the average number of rounds fired by each gun during the eight days? ___ _
The average number of rounds fired each day is 140.
The average number of rounds fired by each gun during the eight days is 1122.
What is a mean?A mean simply means the average of the set of numbers. It is calculated by adding the numbers and then dividing.
In this situation, the British bombarded the German trenches for eight days and some 1,537 British guns fired 1,723,873 rounds without letting up. The average will be:
= 1,723,873 / 1,537
= 1122 rounds .
The average per day will be
= Average / Number of days
= 1122 / 8
= 140 per day.
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If malik purchases an iced coffee drink for $5. 69 and leaves a $1 tip, what percentage did he tip? show all your work based upon your knowledge of proportions.
The percentage of his tip compared to the cost of the iced coffee drink is 17.57%.
Percentage is defined as part of a whole expressed in hundredths or out of 100. It is usually written with the symbol "%".
To determine the percentage, we must first determine the proportion of the amount of the tip compared to the cost of the drink he purchased by dividing the two values. After that, multiply the answer by 100.
percentage = (amount of the tip/cost of the iced coffee drink) x 100
percentage = ($1/$5.69) x 100
percentage = 0.175747 x 100
percentage = 17.57%
Hence, he tip 17.57% of what he purchased.
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what is the quotient of 1/4 divided by 3/5
Answer:
[tex]\frac{5}{12}[/tex]
Step-by-step explanation:
1/4 / 3/5
To divide fractions we flip the second one and then multiply them both and this method works for any number
1/4 x5/3
5/12
Hopes this helps please mark brainliest
How would we write this as an expression? Be sure to define any variables used
Paul worked five more than twice as many hours as Austin
Nia's normal running
route is 3 1/3 miles.
If she ran this route 3 3/4 times
this week, find the total
number of miles she ran.
Please help :') ty ty ty ty ty
Please show your work too! :)
Answer:
I don’t know
Step-by-step explanation:
If a categorical independent variable contains 4 categories, then ________ dummy variables will be needed to uniquely represent these categories. a. 1 b. 2 c. 3 d. 4
If a categorical independent variable contains 4 categories, then four dummy variables will be needed to uniquely represent these categories. a. 1 b. 2 c. 3 d. 4
How many dummy variables are needed to represent the categorical variable?
We need 1 less dummy variable than outcomes for the categorical variable.
categorical variable has 2 outcomes
So, we need 2-1 = 1 dummy variable.
Note: If our categorical variable had 5 outcomes, we would need 5-1 = 4 dummy variables.
b. Write the multiple regression equation relating the dependent variable to the independent variables.
Note: Depending your your professor, this can be written one of the following ways...
yhat = a + b1 x1 + bx2
yhat = b0 + b1 x1 + b2 x2
yhat = beta0hat + beta1hat x1 + betahat2 x2
where x1 is the ratio variable
and x2 is the dummy variable
c. Interpret the meaning of the coefficients in the regression equation.
b0 = the predicted value of y when x1 and x2 both equal 0.
b1 = the change in y when x1 increases by 1 unit holding x2 constant.
b2 = the predicted difference in y between the two possible outcomes of the categorical variable holding x1 constant
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Alex rides his bike to visit two friends and returned home. Interpret the graph to answer questions about his activities.
1. How long did it take Alec to get to his friends house?
2. How long did he stay at his first friends house?
3. How long did it take alec ti ride his bike from his first friends house to his second friends house?
4. How much longer did alec stay at his first friends house than at his second friends house?
5. In which parts of the graph is alec riding his bike toward his home?
6. In which parts of the graph is alec traveling the fastest?
7. How long was alec away from his house?
The required question of the given problem are solved below.
Explain is distance vs time graph?A distance-time graph shows how far an item has gone in a given time. It is a straightforward line diagram that signifies distance versus time discoveries on the chart. Distance is plotted on the Y-pivot. Time is plotted on the X-pivot.
According to question:1) he take 20 minutes to get to his friends house.
2) he stayed 60 - 20 = 40 minutes at his first friends house.
3) he take 70 - 60 = 10 minutes to ride his bike from his first friends house to his second friends house.
4) 30 minutes, he stayed his second friend
Then
Difference = 40 - 30 = 10 minutes
So, he stay 10 minutes longer than first friend.
5) In part E, he is riding towards his home.
6) In part A of the graph he is travelling faster.
7) he went 10 kilometer away from his house.
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Help me out please
answers:
-1/3
3
1/3
-3
please do x to
Answer:
slope = 3
y-intercept = 0
Step-by-step explanation:
Emma has a rain gauge on her deck to measure the amount of rain that falls in the area. After a storm with steady rain, there were 4.23 inches of water in the rain gauge. If the storm lasted 3 hours, how much water did the rain gauge collect every hour?
Answer:
1.41 inches per hour
Step-by-step explanation:
volume of water for 3 hrs=4.23 inches
v of water for 1 hours=4.23/3=1.21inches
if you draw square abcd and extend the sides by equal lengths to form square efgh, what must be the measure of angle heb so that the area of abcd is half the area of efgh?
The measure of angle < HEB = 60 degrees.
Given:
if you draw square abcd and extend the sides by equal lengths to form square efgh.
so that the area of abcd is half the area of efgh.
Let AB = x and HA = x
so area of square ABCD = x * x
= x^2
< HEB = 60 so < BHE = 30
EB = y
HE = 2y
HB = x + y
so x + y = [tex]\sqrt{3}[/tex] y
x = [tex]\sqrt{3}[/tex] y - y
x = ([tex]\sqrt{3}[/tex] - 1 ) y
y = x / ([tex]\sqrt{3}[/tex] - 1 )
squaring on both sides
y^2 = x^2 / ([tex]\sqrt{3}[/tex] - 1 )^2
= x^2 / 3 - 1
= x^2 / 2
Area of EFGH = (2y)^2 = 4y^2 = 2x^2 = 2 * area of ABCD.
Therefore < HEB = 60 degrees.
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i need help plssssssssssss
Answer:
I can't well see question but, their ratios aren't the same
One leg of a right triangle is 6 units long, and its hypotenuse is 12 units long. What is the length of the other leg? Round to the nearest whole number.
10 units
13 units
18 units
4 units
The length of the other leg of the right triangle, rounded to the nearest whole number, is 10 units.
To find the length of the other leg of the right triangle, we can use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.
Let's denote the length of the other leg as x. Given that one leg is 6 units long and the hypotenuse is 12 units long, we can set up the equation:
6^2 + x^2 = 12^2
Simplifying this equation, we have:
36 + x^2 = 144
Subtracting 36 from both sides, we get:
x^2 = 108
Taking the square root of both sides, we find:
x = √108
Rounding this value to the nearest whole number, we have:
x ≈ 10.392
The length of the other leg of the right triangle, rounded to the nearest whole number, is 10 units.
The correct option is: 10 units.
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when the null hypothesis is not rejected, it is possible a type i error has occurred. possible a type ii error has occurred. possible either a type i or a type ii error has occurred. not possible a type ii error has occurred.
When a null hypothesis is not rejected, a type ii error has occurred.
What is a null hypothesis?A null hypothesis being a statistical hypothesis, states that no statistical significance can be present in a set of observations. Usually, hypothesis testing is a method used to judge the veracity of a given sample.
Sometimes, it is called just null, or even it has a symbol, viz, [tex]H_0[/tex].
We consider generally 4 cases:
[tex]H_0[/tex] is accepted when [tex]H_0[/tex] is true ⇒ A correct decision[tex]H_0[/tex] is rejected but is true⇒ Type i error has occurred and is rejected by us, null hypothesis is present[tex]H_0[/tex] is false but is accepted by us⇒ Type ii error has occurred, null hypothesis is not present. [tex]H_0[/tex] is false and is rejected⇒ A correct decision.According to the given question, we have not rejected the null hypothesis.
Thus, we have two options present, either the type ii error has occurred and null hypothesis is not present, or the null hypothesis is present.
Concluding, when a null hypothesis is accepted, it is possible that a type ii error has occurred.
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What is an equation of the line that passes through the point (-5,7) and is parallel
to the line x + 5y = 10?
Answer y=-1/5x+6
Step-by-step explanation:
Rewrite in slop intercept form y=mx+b
5y=10-x
y=2-(x/5)
y=-1/5x+2
Slope = -1/5
Substitute the 2 numbers in the point and solve
y-7=-1/5(x+5)
y=-1/5x+6
Answer:
This exact question has already been answered on the site, but here it is again.