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3 years ago

I suck at basic Geometry. ( episode 2)

Mathematics

2 answers:

natali 33 [55]3 years ago

7 0

Answer:

B and C

Step-by-step explanation:

Triangles are similar if they have the same angles and their sides are proportional

mixer [17]3 years ago

5 0

The answer is B and c

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Please help me!! Will give brainliest

Dmitry [639]

Answer:

4 I think?

Step-by-step explanation:

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3 years ago

Which of the following angle relationships are correct?

g100num [7]

Answer:

B but am not sure tho it's probably A

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3 years ago

The flower garden is a square with sides of 16 feet. How many feet long will the path be Recall the Pythagorean Theorem for righ

TEA [102]

Answer:

Step-by-step explanation:

path= $\sqrt{16^{2} +16^{2} }$

path=22.627417 feet

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3 years ago

Please help i am a 5th grader and this is my math so can you please help

Sliva [168]

Answer:

First I would add 6 and 8 which gives me 14

Then I will add 9 and 2 which gives me 11

I will add the 1 from 14 to 11 which gives me 12

and I combine both numbers to get 12.4 accordingly

Step-by-step explanation:

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3 years ago

Read 2 more answers

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

What is the required sample size for the new study?

This is n for which M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2$

$n = 800.3$

Rounding up:

The required sample size for the new study is 801.

4 0

3 years ago