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Lera25 [3.4K]
2 years ago
14

How many times greater is the area of circle C than the area of circle A.

Mathematics
1 answer:
kicyunya [14]2 years ago
5 0

Answer:

I need a picture

Step-by-step explanation:

sorry but without a picture i don't know wht to do

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5. A study found that the average time it took a person to find their dream home was 5.9 months. If a sample of
solong [7]

Answer:

The 95% confidence interval of the mean time it took a person to find their dream home is between 5.64 months and 6.16 months.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96\frac{0.8}{\sqrt{36}} = 0.26

The lower end of the interval is the sample mean subtracted by M. So it is 5.9 - 0.26 = 5.64 months

The upper end of the interval is the sample mean added to M. So it is 5.9 + 0.26 = 6.16 months.

The 95% confidence interval of the mean time it took a person to find their dream home is between 5.64 months and 6.16 months.

4 0
3 years ago
What is pi <br> 3.15<br> 3.75<br> 3.14
andrey2020 [161]
Your question;
<span>What is pi?
My answer;
Pi or </span>π is commonly known as 3.14
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♥ James
6 0
3 years ago
Read 2 more answers
240 miles in 6 hours as a unit rate
Damm [24]
The unit rate of 240 miles in 6 hours would be 40 miles per hour.
3 0
3 years ago
Read 2 more answers
Find the slope of the line that passes through<br> the points (-6, -2) and (-7, -2)
xxTIMURxx [149]

Answer:

0

Step-by-step explanation:

-2+3/-7+6

o/-1

0

as slope is y2-y1/

x2-x1

7 0
3 years ago
Irene's mean score on 5 tests is 88%. What is
Anestetic [448]

Answer: The least score she can get on her next test is 455 points.

Step-by-step explanation: From the available information, her current mean score is 88%, and that was achieved from a total of 5 tests. Hence, her mean score was computed as follows;

Mean = (Summation of data)/observed data

Where the observed data is 5 and the mean is 88. Therefore the mean can now be expressed as,

88 = Summation of data/5

By cross multiplication we now have

88 x 5 = Summation of data

440 = Summation of data.

So, if she wants to raise her mean score on her next test to 91%, her least possible score would be derived as

91 = (Summation of data)/5

By cross multiplication we now have

91 x5 = Summation of data

455 = Summation of data

Therefore, on her next test, she must score at least 455 points.

4 0
3 years ago
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