Answer
\[\int_{0}^{4}{\int_{{{x}^{2}}}^{8\sqrt{x}}f(x,y) {dy}dx}\]
Work Step by Step
\[\begin{align}
& \text{Let the region} \\
& R=\left\{ \left( x,y \right):0\le x\le 4,\text{ }{{x}^{2}}\le y\le 8\sqrt{x} \right\} \\
& \text{Then,} \\
& \int_{0}^{4}{\int_{{{x}^{2}}}^{8\sqrt{x}}f(x,y) {dy}dx} \\
& \text{Graph} \\
\end{align}\]
