Incorrect. Find and add the volumes of the cylinder and the hemisphere.

The volume of a cylinder is given by $\displaystyle{V}=\pi{{r}}^{{2}}{h}\usepackage{cmbright}\Huge\$ and the volume of a hemisphere is given by $\displaystyle\frac{{1}}{{2}}\cdot\frac{{4}}{{3}}\pi{{r}}^{{3}}\usepackage{cmbright}\Huge\$ . Substitute the values $\displaystyle{r}={20}\usepackage{cmbright}\Huge\$ and $\displaystyle{h}={50}\usepackage{cmbright}\Huge\$ into the formulas, simplify, and add. Then round to the nearest thousand. The correct answer is 80,000 cubic feet.