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2 years ago

13

When you divide by zero the answer is always undefined true or false

1 answer:

Citrus2011 [14]2 years ago

7 0

True. I know for sure because it doesn't mean really anything

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A customer buys 3 bottles of water for ninety-nine cents each seven percent tax on each bottle what is the total bill

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$3.18 when the tax is applied to each bottle separately or at the end of the bill.

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Which Answer is closet to the difference?

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Well the difference is -43 so I'm pretty sure it's gonna be A

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Please help thanks!!!

lora16 [44]

$probablity \: of \: \: six = 29 : 150$

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<em><u>in</u></em><em><u> </u></em><em><u>fraction</u></em><em><u>=</u></em><em><u>29</u></em><em><u>/</u></em><em><u>15</u></em><em><u>0</u></em>

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2 years ago

What is the area of the figure use pi

Inessa05 [86]

Area of triangle = 1/2 (6)(5) = 15
Area of semicircle = 1/2(3.14)(3^2) = 14.13

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Answer
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3 years ago

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In a sample of 70 stores of a certain company, 62 violated a scanner accuracy standard. It has been demonstrated that the condi

uysha [10]

Answer:

We need at least 243 stores.

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 of the interval is:

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

For this problem, we have that:

$n = 70, p = \frac{62}{70} = 0.886$

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 $Z = 1.96$ .

Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.04 with 95% confidence using the large-sample method.

We need at least n stores.

n is found when M = 0.04. So

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

$0.04 = 1.96\sqrt{\frac{0.886*0.114}}{n}}$

$0.04\sqrt{n} = 1.96\sqrt{0.886*0.114}$

$\sqrt{n} = \frac{1.96\sqrt{0.886*0.114}}{0.04}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.886*0.114}}{0.04})^{2}$

$n = 242.5$

Rounding up

We need at least 243 stores.

5 0

2 years ago