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2 years ago

In the figure below, ADBE is the result of a dilation of AABC with point B as the

Mathematics

1 answer:

KATRIN_1 [288]2 years ago

8 0

Answer:

Step-by-step explanation:

the answer is C

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Any help would be great

zhannawk [14.2K]

Answer:

V = 137.2

Step-by-step explanation:

We are given the volume equation. Simply plug in your r into the equation and calculate and you should get 137.189 as your answer.

7 0

2 years ago

You can show your work if u want to Find 2 numbers if Their sum is −7 and their difference is 14

Pepsi [2]

The larger number is (-7+14)/2 = 3.5.

The smaller number is (-7-14)/2 = -10.5.

_____

The two equations a+b=-7, a-b=14 can be solved to get these results. It is genrally convenient to solve them by adding one to the other, or subtracting one from the other.

7 0

3 years ago

How many students must be randomly selected to estimate the mean weekly earnings of students at one college? We want 95% confide

kari74 [83]

Answer:

The sample of students required to estimate the mean weekly earnings of students at one college is of size, 3458.

Step-by-step explanation:

The (1 - α)% confidence interval for population mean (μ) is:

$CI=\bar x\pm z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}$

The margin of error of a (1 - α)% confidence interval for population mean (μ) is:

$MOE=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}$

The information provided is:

σ = $60

MOE = $2

The critical value of z for 95% confidence level is:

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

Compute the sample size as follows:

$MOE=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}$

$n=[\frac{z_{\alpha/2}\times \sigma }{MOE}]^{2}$

$=[\frac{1.96\times 60}{2}]^{2}$

$=3457.44\\\approx 3458$

Thus, the sample of students required to estimate the mean weekly earnings of students at one college is of size, 3458.

8 0

2 years ago

Vicki works 19 hours per week. her take home pay is $17.30 per hour. if vicki is able to save all of her earnings, how long will

Harlamova29_29 [7]

If Vicki works 19 hours per week att $17.30 per hour, then her weekly savings is (17.30)(19) = $328.70 So, if she needs to save at least 4 000, then she it will take her (4000/328.70) which is approximately 12.17 weeks. That means she has to save for at least 13 weeks.

6 0

3 years ago

Read 2 more answers

You spend 30 minutes reading emails. You then spend 3 hours watching television. write the ratio of the amount of time spent rea

oksano4ka [1.4K]

Ten minutes to 1 hour

8 0

3 years ago