Given:
The radius, r=4x
The height,
![h=21xy^2](https://tex.z-dn.net/?f=h%3D21xy%5E2)
To find the volume of the cone:
The volume of the cone formula is,
![V=\frac{1}{3}\pi r^2h](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B1%7D%7B3%7D%5Cpi%20r%5E2h)
Substitute the values of r and h in the above formula we get,
![\begin{gathered} V=\frac{1}{3}\pi\times(4x)^2\times21xy^2 \\ =\frac{1}{3}\pi\times16x^2\times21xy^2 \\ =\pi\times16x^2\times7xy^2 \\ =112\pi x^3y^2 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20V%3D%5Cfrac%7B1%7D%7B3%7D%5Cpi%5Ctimes%284x%29%5E2%5Ctimes21xy%5E2%20%5C%5C%20%3D%5Cfrac%7B1%7D%7B3%7D%5Cpi%5Ctimes16x%5E2%5Ctimes21xy%5E2%20%5C%5C%20%3D%5Cpi%5Ctimes16x%5E2%5Ctimes7xy%5E2%20%5C%5C%20%3D112%5Cpi%20x%5E3y%5E2%20%5Cend%7Bgathered%7D)
Hence, the volume of the cone is
![V=112\pi x^3y^2](https://tex.z-dn.net/?f=V%3D112%5Cpi%20x%5E3y%5E2)
Thus, the correct option is option D.
Using the z-distribution, it is found that the lower limit of the 95% confidence interval is of $99,002.
<h3>What is a z-distribution confidence interval?</h3>
The confidence interval is:
![\overline{x} \pm z\frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Coverline%7Bx%7D%20%5Cpm%20z%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
In which:
is the sample mean.
is the standard deviation for the population.
In this problem, we have a 95% confidence level, hence
, z is the value of Z that has a p-value of
, so the critical value is z = 1.96.
The other parameters are given as follows:
![\overline{x} = 111000, \sigma = 36730, n = 36](https://tex.z-dn.net/?f=%5Coverline%7Bx%7D%20%3D%20111000%2C%20%5Csigma%20%3D%2036730%2C%20n%20%3D%2036)
Hence, the lower bound of the interval is:
![\overline{x} - z\frac{\sigma}{\sqrt{n}} = 111000 - 1.96\frac{36730}{\sqrt{36}} = 99002](https://tex.z-dn.net/?f=%5Coverline%7Bx%7D%20-%20z%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%20%3D%20111000%20-%201.96%5Cfrac%7B36730%7D%7B%5Csqrt%7B36%7D%7D%20%3D%2099002)
The lower limit of the 95% confidence interval is of $99,002.
More can be learned about the z-distribution at brainly.com/question/25890103
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If hat is 5/8 then no hat is 8-5/8 = 3/8 and so on for the scarves. to find the probabilities multiply the cases you have.