If the diameter of an entire coconut is 5 inches, and the coconut meat is 1 inch thick, then there is room for approximately (blank) to the third power of coconut milk. which number correctly fills in the blank in the precious sentence?

The answer is 14.137 cubic inches.

For this case, the radius of whole coconut is 2.5 inches (which is 5 inches / 2).
You have to subtract the thickness of the coconut from this radius for you to get the volume of the space for coconut milk.

new radius = 2.5 - 1 = 1.5 inches

Volume = (4/3)(pi)(r^3)
= (4/3)(pi)(1.5^3)
= 14.137 cubic inches