Compute $\iint _ { D } \sqrt { 36 - x ^ { 2 } - y ^ { 2 } } d A$

Short Answer

Compute $\iint _ { D } \sqrt { 36 - x ^ { 2 } - y ^ { 2 } } d A$ , where $D$ is the disk $x ^ { 2 } + y ^ { 2 } \leq 36$ , by first identifying the integral as the volume of a solid.