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Ulleksa [173]
3 years ago
11

Find the exact value cos A in simplest radical form

Mathematics
1 answer:
iogann1982 [59]3 years ago
3 0

Answer:

5/radical 26

Step-by-step explanation:

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A sample size of n = 64 is drawn from a population whose standard deviation is o = 5.6.
AlekseyPX

Answer:

The margin of error for a 99% confidence interval for the population mean is 1.8025.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this problem:

\sigma = 5.6

So

M = 2.575*\frac{5.6}{\sqrt{64}} = 1.8025

The margin of error for a 99% confidence interval for the population mean is 1.8025.

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3 years ago
Which of the following graphs is described by the function given below?<br> y = 2x2 + 6x + 3
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Step-by-step explanation:

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3 years ago
What property shows that 2/5 x 1 = 40/100
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I believe the commutative property on multiplication

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Answer:

16

Step-by-step explanation:

1/2 ^(-1)=2

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Hope that helped.

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If the length is 10 ft the width is 4 feet and the height is 8 feet what is the surface area​
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