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2 years ago

Nick can type 30 words a minute. How many words can be typed in 9.5 minutes?

Mathematics

2 answers:

Elza [17]2 years ago

4 0

Answer:

285 words

Step-by-step explanation:

Digiron [165]2 years ago

3 0

Nick can type 285 words per minute because. 30•9.5 is 285 getting easy on us :D

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Find the measure of angle 1 and 2 pls

Flura [38]

Answer:

Your answer is

1. 42.5

2. 95

Hope that this is helpful. Vote and like it

4 0

2 years ago

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

2 years ago

Second pictures of my last question

Elanso [62]

Answer:

you really did not give us the full pictuer

Step-by-step explanation:

8 0

2 years ago

2. Write a function that models the relationships among x, y, and r. (Hint: Use the Pythagorean theorem.) Then solve the equatio

In-s [12.5K]

Answer:

$r^{2} = \sqrt{y^{2} + x^{2} }$

Then just plug in the values depending on the bridge you chose I'm pretty sure

also can I get brainliest?

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3 years ago

Solve the equation 12 + 4m = 24 A)m=9 B)m=8 C)m=3 D)m=-6

pantera1 [17]

12 +4m = 24

4m = 12

m = 12/4

m = 3 so choice C. is right sure

8 0

3 years ago