Horses are measure in units called hands. one inch equals 1/4 hand. the average clydesdale is 17 1/5 hands tall. what is th is height in inches?

Plz which expression is equivalent to the expression below?

Ineed in figuring out this problem.

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume