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3 years ago

if the volume of a cone is 108 pi cubic units and the radius is 6 units what is the height of the cylinder

1 answer:

6 0

$\begin{matrix}
V=\pi r^2\left(\frac{h}{3}\right)\\\\
108=\pi \left(6\right)^2\left(\frac{h}{3}\right)\\\\
\pi \left(6\right)^2\left(\frac{h}{3}\right)=108\\\\
\pi \left(36\right)\left(\frac{h}{3}\right)=108\\\\
12\pi h=108\\\\
\frac{12\pi h}{12\pi }=\frac{108}{12\pi }\\\\
h=\frac{9}{\pi }\\\\
\mathbf{h\approx 2.86\:units}
\end{matrix}$

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Answer:

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3 years ago

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Keith_Richards [23]

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Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

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In this problem

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The variable x is the independent variable or input value

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case 2) x is the dependent variable

The statement is false

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case 3) D(x) is a direct variation

The statement is true

see the explanation

case 4) D(x) is a rule for the set of points (5.10). (6, 12) and (-2,-4)

The statement is true

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$D(x)=2(5)=10$ ---> is ok

For x=6

substitute in the linear equation

$D(x)=2(6)=12$ ---> is ok

For x=-2

substitute in the linear equation

$D(x)=2(-2)=-4$ ---> is ok

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