50 POINTS!!! Type the correct answer in each box. Use numerals instead of words.
A publishing company conducted a survey asking readers whether they use e-readers. Of the 3,000 readers surveyed, 1,954 said they read
books on an e-reader.
Use this information to complete the statement. Round your answers to the nearest hundredth.
The approximate sample proportion is
which means that
% of the readers surveyed do not use e-readers.
Answers
Answer:
The correct answer to this is 200 and 34.90%
Step-by-step explanation:
To get the solution, we are looking for, we need to point out what we know.
1. We assume, that the number 3000 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 100% equals 3000, so we can write it down as 100%=3000.
4. We know, that x% equals 1046 of the output value, so we can write it down as x%=1046.
5. Now we have two simple equations:
1) 100%=3000
2) x%=1046
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=3000/1046
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for 1046 is what percent of 3000
100%/x%=3000/1046
(100/x)*x=(3000/1046)*x - we multiply both sides of the equation by x
100=2.868068833652*x - we divide both sides of the equation by (2.868068833652) to get x
100/2.868068833652=x
34.866666666667=x
x=34.866666666667
now we have:
1046 is 34.866666666667% of 3000
Sample proportion = 0.65
And, The percentage of the sample proportion = 65%
The percentage of the readers surveyed do not use e-readers = 35%
What is Proportional?Any relationship that is always in the same ratio and quantity which vary directly with each other is called the proportional.
Given sample size is,
'n' =3000
Of the 3,000 readers surveyed, 1,954 said they read books on an e-reader.
Hence, The probability that The readers surveyed use e-readers sample proportion is,
p = 1954 / 3000
p = 0.6513
Hence, The percentage of the sample proportion is, 65%
And, The readers surveyed do not use e-readers is,
q = 1 - p
q = 1 - 0.651
q = 0.349
Thus, Sample proportion = 0.65
And, The percentage of the sample proportion = 65%
The percentage of the readers surveyed do not use e-readers = 35%
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Which expression represents the following calculation?
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Answers
Answer:
I think it's...
[(2 + 10) × 3] + 9
What is the answer for
(1, 1) and (1,9)
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Answer:
9/0
Step-by-step explanation:
Complete the table by converting the fractions (in the first column) into decimals (in the second column) and vice versa. Fractions Decimals -4/5 1 2/100 0.13 3/4
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Answer:
Step-by-step explanation:
-4/5=-8/10=-0.80
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Directions: Find the value of x.
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Answers
Answer:
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Step-by-step explanation:
you subtract 12 from 102 and get 90. then you divide 90 by 9 and it equals 10. to figure these problems out I always do the order of operations in reverse starting with the answer.
Susan gets a haircut that cost $20 she leaves a 15% tip. she also has to pay 8.4% sales tax. how much will it cost.
Answers
Answer:
$24.68
Step-by-step explanation:
15% of 20=3
8.4% of 20=1.68
20+3+1.7=24.68
I did this by multiplying .15 by 20 to get 3, and multiplying .084 by 20 to get 1.68. Again, add it all together to get $24.68.
Hope this helps :)
Please solve this question
3x-9<12
Answers
Answer:
Step-by-step explanation:
3x-9<12
You carry the 9 to the other side and do the inverse(opposite of take away
3x<12+9
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3x/3x
To cancel out the the x you must devide them together and then devide 21÷3
21/3=7
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Answer: x<7 or (-infinity,7)
Step-by-step explanation:
3x-9<12
3x<21
x<7
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Answers
Answer:
45 divided by $3.05= 14.75
14.75 + 2.5 gallons = 17.25 gallons
Approximate volume gas tank will hold is 17 gallons.
Step-by-step explanation:
The last time it placed an order for ingredients, Sweet Treats Bakery ordered 9,160 kilograms of sugar. This time, the bakery is ordering 75% more sugar. How much sugar is that?
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Answer:
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Step-by-step explanation:
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Answer:
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Answer:
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Step-by-step explanation:
c
2.5
What is the midpoint of the line segment between points (2,6) and (3,8)?
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O (2.5, 2)
O (5, 4.5)
O (4, 5.5)
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The answer is (2.5,7)
Drag the correct steps into order to solve for 5x+5=-20 for x.
Answers
-5 -5
5x=-25
5x/5= -25/5
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Answer:
x= -5
Step-by-step explanation:
Simplifying
5x + 5 = -20
Reorder the terms:
5 + 5x = -20
Solving
5 + 5x = -20
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + 5x = -20 + -5
Combine like terms: 5 + -5 = 0
0 + 5x = -20 + -5
5x = -20 + -5
Combine like terms: -20 + -5 = -25
5x = -25
Divide each side by '5'.
x = -5
Simplifying
x = -5
Player 1 and player 2 are running laps around a field. Player 1 runs 1 lap every 4 minutes, while player 2 runs 1 lap every 15 minutes. If player 1 and player 2 begin their run at the same time and location on the field, in how many minutes will they meet to begin their next lap together?
Answers
Answer:
15 min
Step-by-step explanation:
if it takes Player 1 one min he will meet player two at there second lap after 15 min
If player 1 and player 2 begin their run at the same time and location on the field, In 60 minutes will they meet to begin their next lap together.
What is LCM?The LCM of any two is the value that is evenly divisible by the two given numbers.
Given,
Player 1 and player 2 are running laps around a field
Player 1 runs 1 lap every 4 minutes,
player 2 runs 1 lap every 15 minutes
We need to find in how many minutes will they meet to begin their next lap together
We need to find the LCM of 4 and 15 to find the answer
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15: 15,30,45,60
The least common multiple of 4 and 15 is 60.
The two players meet at the same point after 60 minutes.
Hence If player 1 and player 2 begin their run at the same time and location on the field, In 60 minutes will they meet to begin their next lap together.
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A store owner offered a 25% discount off the regular price of a pair of shoes. The amount of the discount is $4.
What is the regular price of the shoes?
A $8
B $12
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D $16
Answers
Answer:
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Step-by-step explanation:
25% of 16 is 1/4x16=4, which leaves D as as your answer
Answer:
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Step-by-step explanation:
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Rewrite 7 − 8 using the additive inverse and display the new expression on a number line. (5 points)
Select one:
a.
7 + (−8)
An image of a horizontal number line is shown with labels from negative 2 to positive 8. An arrow begins at 0 and ends at 7. Another arrow begins at 7 and ends at negative 1.
b.
7 + 8
An image of a horizontal number line is shown with labels from 0 to 15. An arrow begins at 0 and ends at 7. Another arrow begins at 7 and ends at 15.
c.
7 − (−8)
An image of a horizontal number line is shown with labels from 0 to 15. An arrow begins at 0 and ends at 7. Another arrow begins at 7 and ends at 15.
d.
8 − 7
An image of a horizontal number line is shown with labels from negative 2 to positive 8. An arrow begins at 0 and ends at 8. Another arrow begins at 8 and ends at 1.
Answers
Answer:
i believe it is b
Step-by-step explanation:
Answer: B
Step-by-step explanation:
It is B because It would be the inverse of the equation, which is the opposite of the equation and It is 7+8.
The following are the heat-producing capacities of coal from two mines (in millions of calories per ton): Mine A: 8,500, 8,330, 8,480, 7,960, 8,030 Mine B: 7,710, 7,890, 7,920, 8,270, 7,860. Assuming that the data constitute independent random samples from normal populations with equal variances, construct a 99% confidence interval for the difference between the true average heat-producing capacities of coal from the two mines.
Answers
Answer: The confidence interval will be -91.87 < μ₁-μ₂ <751.87
Step-by-step explanation: Confidence Interval is the interval of certainty in which the true population mean is in.
In a confidence interval for the difference between two averages with a sample size less than 30, the calculations are:
[tex]x_{1}-x_{2}[/tex] ± [tex]t.S_{p}\sqrt{\frac{1}{n_{1}} +\frac{1}{n_{2}} }[/tex]
in which
x₁ and x₂ are the sample mean of each data set
t is the probability found in the t-table whose df = n₁ + n₂ - 2
[tex]S_{p}[/tex] is the pooled estimate of the common standard deviation, assuming variances are similar, and can be calculated as:
[tex]S_{p}=\sqrt{\frac{(n_{1}-1)(s_{1})^{2}+(n_{2}-1)(s_{2})^{2}}{n_{1}+n_{2}-2} }[/tex]
n₁ and n₂ are sample sizes
The data to construct the interval are:
Mine A:
x₁ = 8260
s₁ = 251.9
n₁ = 5
Mine B:
x₂ = 7930
s₂ = 206.52
n₂ = 5
Then:
[tex]S_{p}=\sqrt{\frac{(5-1)(251.9)^{2}+(5-1)(206.52)^{2}}{8}[/tex]
[tex]S_{p}=\sqrt{\frac{253814.44+170602.04}{8}[/tex]
[tex]S_{p}=[/tex] 230.33
Using a table, for a 99% confidence and df = 8, t-score = 2.896.
Doing calculations:
(8260-7930) ± (2.896)(230.33)([tex]\sqrt{\frac{1}{5} +\frac{1}{5} }[/tex])
330 ± (2.896)(230.33)([tex]\sqrt{0.4}[/tex])
330 ± 421.87
Interval will be
[tex]-91.87<\mu_{1}-\mu_{2}<751.87[/tex]
A 99% confidence interval for the difference between the true average heat-producing capacities of coal from the mines is between -91.87 and 751.87
What is the y-intercept of the quadratic function
f(x)= (- 8)(x +3)?
Answers
Answer:
-24
Step-by-step explanation:
The standard from of equation of a line is expressed as g(x) = mx+c where;
m is the slope
c is the y-intercept of the line.
Given the expression g(x)= (- 8)(x +3), rewriting in standard form first we have;
g(x)= (- 8)(x +3)
gx)= -8x - 24
On Comparing with g(x) mx+ c, we will see that;
c = -24
Hence the y-intercept of the quadratic function is -24
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Answers
Henry is making a corn grits recipe that calls for 14 cup of corn grits for every 12 cup of water.
How much water will he need if he uses 112 cups of corn grits?
Answers
Answer:
2 cups of water
Step-by-step explanation:
what is the solution of sqaure root -4x = 100
Answers
Answer:
I’m pretty sure it’s -2500
Step-by-step explanation:
Answer:
I think it would be x = -2500
Step-by-step explanation:
You square both sides to get rid of the square root and get -4x = 10000 then divide 10000 by -4 to get -2500
Evaluate the expression 4² -3.4+ 7
Answers
Answer:
19.6
Step-by-step explanation:
there
The book store is having a sale. Every book is $5 off, regardless of the original price.
The sale price for every book is $5 less than the original price.
Let x = original price
Let y = sale price
Which equation represents this situation?
A. y = × + 5
B. y = × - 5
C. y = 5x
D. y = × ÷ 5
Answers
Answer:
y=x-5
Step-by-step explanation:
sale price (y) is equal to the original (x) minus five dollars
Answer:
y = x - 5
Step-by-step explanation:
I took the test on A P E X
What is the population density of 13 lillies living in an area of 6 meters (length) and 4 meters (width)?
Answers
Answer:
0.54 lillies per square meter.
Step-by-step explanation:
First we calculate the area:
Area = length * width
Area = 6 m * 4 m = 24 m²
The we divide the population of lillies (13) by the area, to calculate the population density:
13 lillies / 24 m² = 0.54 lillies/m²
So the population density is 0.54 lillies per square meter.
10 points for correct answer and giving brainliest
Answers
Answer:
A
Step-by-step explanation:
We know it cant be -6 as that would be a range and since the circle on the end is hallow it wont be less or equal to rather just less than and the since the next one is 2 and its solid circle it has to be less than or equal too
Answer:
A. -9 < x ≤ -2
General Formulas and Concepts:
Algebra I
Domain is the set of x-values that can be inputted into function f(x)Step-by-step explanation:
According to the graph, the line's x-values span from -9 to 2. Since -9 is an open dot, it is exclusive in the domain. Since 2 is a closed dot, it is inclusive in the domain:
(-9, 2] or -9 < x ≤ -2
which numbers are rational A)-4.34
B)0.43222
C)7.234156
Answers
Answer:
C
Step-by-step explanation:
The other 2 aren't rational numbers
I am not completely confident in my answer, so lmk if it's right