Answer:
B. The surface area.
Step-by-step explanation:
4πr^2 gives the surface area of a sphere.
%75 I guess unless this is like highschool math
Answer:

Step-by-step explanation:
It is given that,
V = bdt i.e. V is equal to the product of b, d and t
We need to find the formula for d.
Dividing both sides of the given expression by bt
So,

Hence,
is the value of d.
28.7083333333...
But you could also round it up to 29.