Answer
$\frac{32}{3}$
Work Step by Step
$\int_{0}^{2} \int^{0}_{x^2-4}dydx+\int_{0}^{{\sqrt{x}}}dydx$
=$\int_{0}^{2}(4-x^2)dx+\int_{0}^{4}x^{1/2}dx$
=$[4x-\frac{x^3}{3}]^2_0+[\frac{2}{3}x^{3/2}]^4_0=(8-\frac{8}{3})+\frac{16}{3}=\frac{32}{3}$