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3 years ago

Barney has 1 16

Mathematics

1 answer:

Mars2501 [29]3 years ago

3 0

1165 divided by 255 = 5.17 = 5 costumes

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Please help me with this IXL! Thanks

vfiekz [6]

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3 years ago

For which equation is x=0 NOT a solution?

Nimfa-mama [501]

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3 years ago

A large on-demand, video streaming company is designing a large-scale survey to determine the mean amount of time corporate exec

Firdavs [7]

Answer:

554 executives should be surveyed.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

Standard deviation of 3 hours.

This means that $\sigma = 3$

The 95% level of confidence is to be used. How many executives should be surveyed?

n executives should be surveyed, and n is found with $M = 0.25$ . So

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

$0.25 = 1.96\frac{3}{\sqrt{n}}$

$0.25\sqrt{n} = 1.96*3$

$\sqrt{n} = \frac{1.96*3}{0.25}$

$(\sqrt{n})^2 = (\frac{1.96*3}{0.25})^2$

$n = 553.2$

Rounding up:

554 executives should be surveyed.

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Nataliya [291]

This is the answer that I came out with. Hope it helps.

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3 years ago

What is the prime factorization of 89u^3 and 11u

Alchen [17]

Answer:

Socratic app

Step-by-step explanation:

it will help you

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