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3 years ago

Please help thanks!!

Mathematics

1 answer:

vodka [1.7K]3 years ago

8 0

1/3 is the value of f

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an octagon has sides that all have a length of y. Write a simplified algebraic expression for the perimeter of the octagon in te

padilas [110]

Answer = 8y

Step-by-step explanation:

if an octagon has 8 sides and each side is = to y then the total side length in the primiter is = to 8sides times y or 8y

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3 years ago

Natalie reads an average of 205 minutes a week. A year has 52 weeks.

Deffense [45]

Answer:

10,660

Step-by-step explanation:

You multiply 205 and 52.

205 · 52

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4 years ago

Read 2 more answers

The school team has 80 swimmers. The ratio of seventh-grade swimmers to all swimmers is 5 : 16. Write a proportion that gives th

ElenaW [278]

<h2>(25) 7th Grade Swimmers</h2><h2>25:80</h2>

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3 years ago

An experimenter flips a coin 100 times and gets 59 heads. Find the 98% confidence interval for the probability of flipping a hea

lara [203]

Answer:

The 98% confidence interval for the probability of flipping a head with this coin is (0.4756, 0.7044).

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

An experimenter flips a coin 100 times and gets 59 heads.

This means that $n = 100, \pi = \frac{59}{100} = 0.59$

98% confidence level

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

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.59 - 2.327\sqrt{\frac{0.59*0.41}{100}} = 0.4756$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.59 + 2.327\sqrt{\frac{0.59*0.41}{100}} = 0.7044$

The 98% confidence interval for the probability of flipping a head with this coin is (0.4756, 0.7044).

5 0

3 years ago

HELPPP.

xz_007 [3.2K]

Answer:

Step-by-step explanation:

4+4+.1*(15+15)=11

8 0

3 years ago