Your answer is going to be Letter B
Its been a while since I have done geometry but I think it's pretty obvious that it's ABC > DBC
Answer:
B
Step-by-step explanation:
Subtract 20 from both sides:

Divide both sides by -1:

Square both sides:

Subtract 9 by both sides:

Divide both sides by -8:

That means that either a or b is correct and since 9/8 is positive that means it needs to bee less than 9/8 so the correct answer is B
Given expression- 
Here, V(r) is the function dependent on the variable r whch is the radius of any sphere.
By plugging different values of r in the formula. one can find the volume associated with it.
Here, V(r) represents the volume of the sphere when the radius is equal to r.