Chapter 16.2, Problem 70E

Two integrals to one Draw the regions of integration and write the following integrals as a single iterated integral.

70. ${\displaystyle {\int }_{-4}^0{\displaystyle {\int }_0^{\sqrt{16-x^2}}f(x,y)dydx+{\displaystyle {\int }_0^4{\displaystyle {\int }_0^{4-x}f(x,y)dydx}}}}$