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2 years ago

Hey, amazing people can you help me? I will give 25 points and brainlist!

Mathematics

2 answers:

Nadya [2.5K]2 years ago

5 0

I think the answer is C

Bumek [7]2 years ago

3 0

Answer: C, I think!

Step-by-step explanation: 3pi equals 9.4247. The square root of 100, is 10. So, that gives us 10/4. That simplified gives us 2.5.

For A, the square root of 36 is 6. 6 is in between 2.5 and pi, so that is not it.

For B, pi to the second power over 3 equals 3.2897, so that’s not it too!

For C, pi over 2 is 1.5708, so that is it, I’m pretty sure!

I’m only in 7th grade, so I’m sorry if it’s wrong!

Sorry if I made typos!

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1 year ago

Read 2 more answers

In an effort to improve scores on college-entrance exams, the principal at a large high school chooses 35 students

denpristay [2]

Using the t-distribution, it is found that the test statistic for the hypotheses test is given by:

$t = \frac{-1.75 - 0}{\frac{7.12}{\sqrt{35}}}$

<h3>What are the hypotheses tested?</h3>

At the null hypotheses, it i tested if the mean difference remains the same, that is:

$H_0: \mu = 0$

At the alternative hypotheses, it is tested if it has decreased, hence:

$H_a: \mu < 0$ .

<h3>What is the test statistic?</h3>

The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

s is the standard deviation of the sample.

n is the sample size.

The parameters are given as follows:

$\overline{x} = -1.75, s = 7.12, n = 35$ .

Hence the test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{-1.75 - 0}{\frac{7.12}{\sqrt{35}}}$

More can be learned about the t-distribution at brainly.com/question/16162795

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1 year ago

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3 years ago

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2 years ago

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Answer:

Step-by-step explanation:

you need to use PEMDAS

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2 years ago