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Sergio039 [100]
3 years ago
11

NEED HELP PLEASE HURRY.  The diameter of the larger circle is 12.5 cm. The diameter of the smaller circle is 3.5 cm.

Mathematics
2 answers:
nignag [31]3 years ago
5 0
113.04, I actually just finished this quiz.
Leona [35]3 years ago
5 0

Answer:

113.04

That dude in the other answer is most likely  to be in K12 just like me.

And also, I just finished the quiz asweal.

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The mean area of homes in a certain city built in 2009 was 2438 square feet. Assume that a simple random sample of 11 homes in t
mr Goodwill [35]

Answer:

The p-value of the test is 0.029.

Step-by-step explanation:

The mean area of homes in a certain city built in 2009 was 2438 square feet.

An insurance company wants to know if the mean area of homes built in 2010 is less than that of homes built in 2009.

This means that at the null hypothesis we test if the mean is the same as in 2009, that is:

H_0: \mu = 2438

At the alternate hypothesis, we test that if it is less, than is;

H_a: \mu < 2438

The test statistic is:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.

2438 is tested at the null hypothesis:

This means that \mu = 2438

Assume that a simple random sample of 11 homes in the same city built in 2010 had a mean area of 2,293 square feet, with a standard deviation of 225 square feet.

This means that n = 11, X = 2293, s = 225

Value of the test statistic:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{2293 - 2438}{\frac{225}{\sqrt{11}}}

t = -2.14

Compute the P-value of the test.

Probability of finding a mean less than a value(in this case, 2293) is a one-tailed test.

The pvalue is found for a one-tailed test, with t = -2.14 and 11 - 1 = 10 degrees of freedom. With the help of a calculator, the pvalue of the test is of 0.029

The p-value of the test is 0.029.

7 0
3 years ago
Simplify the expression. (1)/(2)(-(5)/(6)+(1)/(3))
o-na [289]

Answer:

0.5

Step-by-step explanation:

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Which is the best estimate for the sum 2/9 +10/11 ?
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D

Step-by-step explanation:

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