Question

Calc help please cross sections
The solid lies between plafrom nes perpendicular to the x-axis at x=0 and x=4
The cross sections perpendicular to the x-axis between these planes run the following

Answer 1

\[-\sqrt{x}\]
and
\[\sqrt{x}\]
and the cross sections are circular disks

Answer 2

I suck at these but let's try..