They don’t have anything in common
65,000=6.5*10^4
In scientific notation
Using shells, the volume is

where

is the distance from any point in the region along the x-axis to the axis of revolution

, which makes up the radius of each shell; and

is the height of each shell, which is determined by the line

.
So the volume is
40(8) + (2(12))(8) + 200
320 + 24(8) + 200
520 + 192
712
Answer: B. 712