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2 years ago

What is the awnser to 9 1/3 ÷ 8

Mathematics

2 answers:

Ostrovityanka [42]2 years ago

8 0

Answer:

$\frac{7}{6}$ is the answer for this question.

Step-by-step explanation:

You'll get your answer By reducing the expression, if possible, by cancelling the common factors.

And that'll be your final answer - $\frac{7}{6}$

trasher [3.6K]2 years ago

7 0

Answer:

Step-by-step explanation:

9 1/3 ÷ 8 =[(9×3 + 1)/3]÷8 = [28/3]÷8 = 28/24 = 7/6.

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At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population pro

Gnom [1K]

Answer:

A sample of 1068 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 $1 - \frac{\alpha}{2}$ .

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 $Z = 1.96$ .

At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population proportion?

We need a sample of n.

n is found when M = 0.03.

We have no prior estimate of $\pi$ , so we use the worst case scenario, which is $\pi = 0.5$

Then

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

$0.03 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.03\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.03}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.03})^{2}$

$n = 1067.11$

Rounding up

A sample of 1068 is needed.

8 0

2 years ago

What is the vertex for this function? y=2x2−12x+16

Scrat [10]

Answer:

(3,-2)

Step-by-step explanation:

Rewrite in vertex form and use this form to find the vertex

4 0

2 years ago

Write a function rule for the table

Ghella [55]

Answer:

Step-by-step explanation:

Recall the slope is change of y over change of x which in this case the change in x is 1 while the change in y is 2 since the $y$ 's are going up by 2 while the $x$ 's are going up by 1.