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3 years ago

Can someone please help me?

Mathematics

2 answers:

krok68 [10]3 years ago

8 0

B, i think since it’s still showing 2/3 being multiples my n and then added to 12

ahrayia [7]3 years ago

7 0

Answer:

Step-by-step explanation:

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The measure of one acute angle in a right triangle is 75.5°. What is the measure of the other acute angle in the triangle?

Serga [27]

The answer is 14.5 degrees because and acute triangle is less than 90 degrees and you subtract 75.5 from 90 and you get 14.5. Hope I helped you

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3 years ago

Using a number line. What fraction of 1 foot is 3 inches? What fraction of 1 yard is 3 inches?

alexira [117]

3 inches in 1 foot is: 1/4
3 inches in 1 yard is: 41667/500000

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4 years ago

Please delete my question?

professor190 [17]

Answer:

Yes

Step-by-step explanation:

This is a Brainly worker and we are doing everything we can to delete it

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2 years ago

A 95% confidence interval for a population mean is computed from a sample of size 400. Another 95% confidence interval will be c

Anna [14]

Answer:

The interval from the sample of size 400 will be approximately <u>One -half as wide</u> as the interval from the sample of size 100

Step-by-step explanation:

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the 95% confidence interval is dependent on the value of the margin of error at a constant sample mean or sample proportion

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{\sigma}{\sqrt{n} }$

Here assume that $Z_{\frac{\alpha }{2} } \ and \ \sigma \$ is constant so

$E = \frac{k}{\sqrt{n} }$

=> $E \sqrt{n} = K$

=> $E_1 \sqrt{n}_1 = E_2 \sqrt{n}_2$

So let $n_1 = 400$ and $n_2 = 100$

=> $E_1 \sqrt{400} = E_2 \sqrt{100}$

=> $E_1 = \frac{\sqrt{100} }{\sqrt{400} } E_2$

=> $E_1 = \frac{1}{2 } E_2$

So From this we see that the confidence interval for a sample size of 400 will be half that with a sample size of 100

7 0

3 years ago

8. Where is the National Civil Rights Museum located?

Kipish [7]

Answer:

Tennessee

Step-by-step explanation:

Memphis, Tennessee-this is not a mathematics question though, that would probably be history or geography

6 0

3 years ago

Read 2 more answers