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3 years ago

A prism has a total surface area of 228 m2 and volume of 216 m3.

1 answer:

4 0

Multiply by 1/3 to reduce.
228*1/3=76m^2
216*1/3=72m^3

Multiply by 4 to increase.
228*4=912m^2
216*4=864m^3

I can explain more if you need.

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Which table of ordered pairs represents a proportional relationship

Citrus2011 [14]

You are right on the answer

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3 years ago

The width of a rectangle is the length minus 2 units. The area of the rectangle is 63

Damm [24]

Answer: 7

Step-by-step explanation:

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3 years ago

Can someone help me find the surface area of the cube???

nirvana33 [79]

The equation needed is (Surface area of a cube)
A=6×a²
Therefore your answer would be...
194.94 in.³

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2 years ago

If you want to be 95% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard

Aleksandr [31]

Answer:

The sample size required is at least 171

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 Ztable as such z has a pvalue of $1-\alpha$ .

So it 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.

What sample size is required?

A samle size of at least n is required, in which n is found when $M = 3, \sigma = 20$

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

$3 = 1.96*\frac{20}{\sqrt{n}}$

$3\sqrt{n} = 20*1.96$

$\sqrt{n} = \frac{20*1.96}{3}$

$(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}$

$n = 170.7$

Rouding up

The sample size required is at least 171

5 0

2 years ago

Simplify the expression. (–2)5 16 –10 –32 32

BigorU [14]

Answer:

the answer is -10

Step-by-step explanation:

Its basically multiplication

4 0

2 years ago