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Mkey [24]
2 years ago
5

I do not know how to do this

Mathematics
1 answer:
kipiarov [429]2 years ago
3 0

Answer:

15

Step-by-step explanation:

15

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The smallest whole number by which 9408 must be divided to get perfect square number
Snezhnost [94]

Answer:

9408,Is the only number that can divide into the same number to get exactly down to 1.

Step-by-step explanation:

4 0
2 years ago
In a survey, the planning value for the population proportion is . How large a sample should be taken to provide a confidence in
tatuchka [14]

Answer:

n=350

Step-by-step explanation:

Notation and definitions

n random sample taken  (variable of interest)

\hat p=0.35 estimated proportion  (value assumed)

p true population proportion

Confidence =0.95 or 95% (value assumed)

Me=0.05 (value assumed)

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.05 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.35(1-0.35)}{(\frac{0.05}{1.96})^2}=349.586  

And rounded up we have that n=350

4 0
2 years ago
Marilyn saves 30% of the money she earns each month.She earns $350 each month.How much does she save?​
Delicious77 [7]

Answer:

$245

Step-by-step explanation:

Savings percent= $350 × 30%

=$350 × 30/100

= $105

Money saved= $350- $105

= $ 245

6 0
3 years ago
Alex made $28.74 for three hours of work at his job at the pet store . If he works a total of 40 hours in one week , how much mo
Alex

Answer:

$383.20

Step-by-step explanation:

28.74 ÷ 3 = $9.58 per hour

9.58 x 40 = 383.20

8 0
2 years ago
I want to know the answer of A to self check the answer i got! Would you write the expression and take away the area of the inte
V125BC [204]
It is said the blue card is a rectangle, so you don’t have to minus the inside rectangle. :)
7 0
3 years ago
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