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earnstyle [38]
3 years ago
15

The length of a rectangle is 4 times its width. The rectangle’s width is 8 m. What is the area of the rectangle? Enter your answ

er in the box. _______m2
Mathematics
2 answers:
docker41 [41]3 years ago
5 0
A = L * W
W = 8
L = 4W....L = 4(8) = 32

A = 32 * 8
A = 256 m^2 <==
prisoha [69]3 years ago
3 0
If the width is 8 meters and the length is
4 times the width then the length is 32 meters. Therefore according to the formula (length x width), multiply 32 and 8 which will result in the product of 256 square meters
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The average score on a standardized test is 750 points with a standard deviation of 50 points. What is the probability that a st
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3 years ago
Read 2 more answers
If a manufacturer conducted a survey among randomly selected target market households and wanted to be 95​% confident that the d
katen-ka-za [31]

Answer:

We need a sample size of least 119

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.

Sample size needed

At least n, in which n is found when M = 0.09

We don't know the proportion, so we use \pi = 0.5, which is when we would need the largest sample size.

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

0.09 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.09\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.09}

(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.09})^{2}

n = 118.6

Rounding up

We need a sample size of least 119

6 0
3 years ago
Help please..................
JulsSmile [24]
The answer is 120 lol
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3 years ago
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