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lesya [120]
2 years ago
5

Find the volume of a cone that has radius = 2 1/2 and height = 5.

Mathematics
2 answers:
Andreas93 [3]2 years ago
7 0

Answer:

98.1 is your anwser I know this kinds of stuff

muminat2 years ago
6 0

Step-by-step explanation:

v=22/7×r^2×h/3

=22/7×21/2×5/3

=33/5

=11cm^3

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Which one of the following statements expresses a true proportion?
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Stan invests $5000, some at 6% interest and the rest at 4.5% interest. If x is the amount he invests at 6%, then the amount inve
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The principal at Riverside High School would like to estimate the mean length of time each day that it takes all the buses to ar
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Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

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n represent the sample size  

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    

And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from the last equation we got:

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And replacing the values that we got we have:

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C) 11

8 0
3 years ago
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