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vlabodo [156]
2 years ago
13

Find the base of a parallelogram with a height of 7cm and an area of 63cm

Mathematics
1 answer:
Naya [18.7K]2 years ago
7 0

Answer:

it is  b=9cm  

Because....

well it is way to long.... so ya!

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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
If equation two is multiplied by -2 and then the equations are added, the result is
LUCKY_DIMON [66]

Answer: Yes, this is true but it can be a different answer.

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[1] Sven has 11 more than twice as many customers as when he started selling newspapers he now has 73 customers how many did he
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The answer for number 1 is 73×2+11 I think
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What is the slope of y=4x+5 (show work)
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The slope is 4. It's right there in the problem. The equation underneath that is y=mx + b. M, in this case 4 or 4/1 is the slope. And 5 is the y intercept or where the line crosses the y axis.
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3 years ago
Read 2 more answers
Can anyone please help me
astraxan [27]

Answer:

its 72

Step-by-step explanation:

hope this helps

6 0
3 years ago
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