Cone's volume is third of cylinder's volume, so 321*1/3=107 cubic units. Answer A. is correct.
Find the height of it with pythagoras
Root(100-36)=8
Volume = 1/3 pi r^2 h
1/3(36pi x 8)
=96pi
about 301.59ft^3
Hun, these questions look opinionated. They are asking what all you can do and what you need help with.

then divide

by

, which is the number of ounces in a single pound. What is the number you wind up with? :)