Chapter 13.5, Problem 26E

Mass from density Find the mass of the following objects with the given density functions.

26.    The solid paraboloid $\left\{\left(r,\theta ,z\right):0\le z\le 9-r^2,0\le r\le 3\right\}$ with $\rho \left(r,\theta ,z\right)=1+z/9$