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2 years ago

Show work btw ….. math math math

Mathematics

1 answer:

scoundrel [369]2 years ago

6 0

1,3,5 are congruent.

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PLEASE HELP FOR 30 POINTS....GEOMETRY/TRIG

Advocard [28]

Answer:

10/cot 62 degrees

Step-by-step explanation:

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3 years ago

How write 89,170,326 in expanded and

evablogger [386]

80,000,000+9,000,000+100,000+70,000+300+20+6

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3 years ago

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we believe that 42% of freshmen do not visit their counselors regularly. For this year, you would like to obtain a new sample to

Maksim231197 [3]

Answer:

A sample of 1077 is required.

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 of:

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

42% of freshmen do not visit their counselors regularly.

This means that $\pi = 0.42$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.327$ .

How large of a sample size is required?

A sample size of n is required, and n is found when M = 0.035. So

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

$0.035 = 2.327\sqrt{\frac{0.42*0.58}{n}}$

$0.035\sqrt{n} = 2.327\sqrt{0.42*0.58}$

$\sqrt{n} = \frac{2.327\sqrt{0.42*0.58}}{0.035}$

$(\sqrt{n})^2 = (\frac{2.327\sqrt{0.42*0.58}}{0.035})^2$

$n = 1076.8$

Rounding up:

A sample of 1077 is required.

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3 years ago

Solve 7(-1 + 4x) – 12x = 5. Check your solution.

Rzqust [24]

Answer:

x= $\frac{3}{4}$ or 0.75

Step-by-step explanation:

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3 years ago

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When Pheobe asked her friends about their Thanksgiving, 35% of her 60 friends said they had pumpkin pie for dessert. How many fr

nataly862011 [7]

Answer:

Step-by-step explanation:

I dunno, I used a calculator B)

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3 years ago

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