CPM Homework Help : CALC Problem 8-126

Multiple Choice: The base of a solid is a region in the first quadrant under the curve $f(x) =\sqrt { x - 4 }$ . The cross-sections of the solid perpendicular to the $x$ -axis are squares. What is the volume of the solid?

$\frac { 16 } { 3 }$

$\frac { 64 } { 9 }$

$8\pi$

$\frac { 16 \pi } { 3 }$

Hint:

Volume by Cross Sections $=\int_{x=a}^{x=b}(\text{Area function})dx$