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3 years ago

Hi..........help me....please math..........

Mathematics

1 answer:

telo118 [61]3 years ago

6 0

First things first. You need to know the formula for finding volume of a pyramid.

The formula is V=1/3Bh or Volume=1/3*Base Area*height

-Remember >Capital B means base area...not base

What did the problem give us?

-The height of the pyramid is 6 cm
-The length and width of the base is 2 cm

Lets plug what we know into the formula.

V=1/3Bh > 1/3(4)6
Now you would have to solve it.

1/3(4)=1.33333333333

1.33333333333*6=8

So the answer is 8 cm.

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3 years ago

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3 years ago

Read 2 more answers

Twenty-five adult citizens of the United States were asked to estimate the average income of all U.S. households. The mean estim

Sidana [21]

Answer:

$65000-2.06 \frac{15000}{\sqrt{25}}=58820$

$65000+2.06 \frac{15000}{\sqrt{25}}=71180$

We are confident that the true mean for the average income of all U.S. households is between (58820;71180)

Step-by-step explanation:

Information provided

$\bar X=65000$ represent the sample mean for the average income of all US households

$\mu$ population mean

s=15000 represent the sample standard deviation

n=25 represent the sample size

Confidene interval

The confidence interval for the true mean of interest is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=25-1=24$

The Confidence level is is 0.95 or 95%, then the significance is $\alpha=0.05$ and $\alpha/2 =0.025$ , the critical value for this case would be $t_{\alpha/2}=2.06$

Replacing in formula (1) we got:

$65000-2.06 \frac{15000}{\sqrt{25}}=58820$

$65000+2.06 \frac{15000}{\sqrt{25}}=71180$

We are confident that the true mean for the average income of all U.S. households is between (58820;71180)

6 0

3 years ago