Jeremy must find the volume of the shaded body formed when a cylinder of radius 2 is removed from a cylinder of radius 5 as pictured below. mc015-1.jpg if the height of the cylinders is 18 units, which expression is equivalent to the volume of the shaded part of the figure in cubic units?

Since you did not provide a picture, I'm going to guess that the sensible question would be to find the remaining volume when the inner cylinder is removed or cut out from the bigger cylinder (blue region). That could be easily determined by subtracting the volume of the smaller cylinder to that of the bigger cylinder.

Volume of cylinder = π*r^2*h
Volume of shaded region = π*5^2*18 - π*2^2*18
Volume of shaded region = 378π = 1,187.52 cubic units

The key is the word about, they want an estimation.63 is closer to 60, 71 is closer to 7060 + 70 = 130ryan counted about 130 birds