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2 years ago

Franklin had $277 to spend on nine. After buying them , he had $16 left. How much did each book cost

Mathematics

1 answer:

schepotkina [342]2 years ago

8 0

Answer:

Each book cost $29.00

Step-by-step explanation:

$277-$16=$261.00

$261÷ 9= $29.00

Therefore each book costed $29.00

I hope this helps in any way.

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2 years ago

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faust18 [17]

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Step-by-step explanation:

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2 years ago

In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation

Rainbow [258]

Answer: C. $(29,\ 37.8)$

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

$\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}$

Given : Level of significance : $1-\alpha:0.99$

Then , significance level : $\alpha: 1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=2.576$

$n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9$

$46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)$

Hence, a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides $(29,\ 37.8)$

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3 years ago

How can I get the anserw of 6.3 divided 0.7

gayaneshka [121]

You can use your calculator if you have one or do long division. just make sure to move the decimal so it looks like this: 63 divided by 7. you answer should be 9

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3 years ago

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Lemur [1.5K]

27.7-. or is it something else?!?!?

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3 years ago