Answer:The answer is B !
Step-by-step explanation:
6 to the fourth power is 1296 because 6x6x6x6 gives you 1296
See attachment for one such shell. The volume is given by the sum of infinitely many thin shells like this, each with radius

and height determined by the vertical distance between the upper blue curve and the lower orange curve for any given

, i.e.

.
The volume is then