(Solved): Evaluate 261Dx2+y2dA, where D is the domain in the figure and a=26. (Give your answer i ...

Evaluate $\frac{1}{26}{?}_D\sqrt{x^2+y^2}dA$, where $D$ is the domain in the figure and $a=26$. (Give your answer in exact form. Use symbolic notation and fractions where needed.) Hint: Find the equation of the inner circle in polar coordinates and treat the right and left parts of the region separately. $\frac{1}{26}{?}_D\sqrt{x^2+y^2}dA=$ Incorrect