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3 years ago

6

rectangle A has 7 times the area of rectangle B. The width of rectangle A is 1/4 the width of rectangle B. The height of rectang

le A is 12 cm. What is the height of rectangle B?

1 answer:

algol133 years ago

8 0

Answer:

just do 7 times 1/4 + the 12 thats your answer

Step-by-step explanation:

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Step-by-step explanation:

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Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25$

And rounded up we have that n=421

Step-by-step explanation:

We know that the sample proportion have the following distribution:

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

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 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by:

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

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And on this case we have that $ME =\pm 0.04$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

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We assume that a prior estimation for p would be $\hat p =0.5$ since we don't have any other info provided. And replacing into equation (b) the values from part a we got:

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Fudgin [204]

Answer:

Step-by-step explanation:

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3 years ago

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snow_tiger [21]

Answer:

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Step-by-step explanation:

9/25 x 100

= 36%

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3 years ago

Read 2 more answers