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3 years ago

What is the measure of AC ? Enter your answer in the box.

Mathematics

1 answer:

elena55 [62]3 years ago

6 0

Answer:

can anyone explain step by step how to fiquire this out please .. sons teacher isnt helping

Step-by-step explanation:

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Suppose a car burns 1 gallon of gas in 25 miles. How much gas will be burned on a trip of 400 miles.

d1i1m1o1n [39]

16 gallons will be burned

4 0

3 years ago

Find the future value of the principal.<br>help me pls :(

Vitek1552 [10]

Answer:

54,000

Step-by-step explanation:

30,000/8% then multiply the answer by 10 than add that to 30,000

3 0

3 years ago

The attraction or repulsion of two objects is called blank force what is the blank

Crazy boy [7]

I believe it would be magnetism.

3 0

3 years ago

Skipping Lunch A nutritionist wishes to determine, within 3%, the true proportion of adults who do not eat any lunch. If he wish

mixas84 [53]

Answer:

A sample of at least 545 adults is needed.

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 $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$\pi = 0.15$

The margin of error is:

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

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 $Z = 1.96$ .

If he wishes to be 95% confident that his estimate contains the population proportion, how large a sample will be necessary?

We need a sample of at least n.

n is found when M = 0.03. So

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

$0.03 = 1.96\sqrt{\frac{0.15*0.85}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.15*0.85}$

$\sqrt{n} = \frac{1.96\sqrt{0.15*0.85}}{0.03}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.15*0.85}}{0.03})^{2}$

$n = 544.23$

Rounding up

A sample of at least 545 adults is needed.

6 0

2 years ago

Pls answer this with an explanation if you can

Rasek [7]

Answer: 7 to 4

Step-by-step explanation: There are 16+12=28 total students, and 16 boys. Therefore, the ratio is 28:16, but you must simplify that, you can do this by dividing both values by 4 to get 7:4.

7 0

3 years ago