Determine the volume of a solid produced by rotating about the line $y=16$ the region bounded by the indicated equations.
$x=-1.6y$, $y=8.4$, $x=2.1 y^{1/2}$. Round off only on the final answer expressed in 3 decimal places.
Instead of units, type any of the following letters that correspond to the best method to use to solve this using a SINGLE integral:
Type D if disk, W if washer, S if shell.