Answer:
I think its either C or D but im not very sure.
Step-by-step explanation:
The formula to find the volume of a sphere is: V=

Since the diameter is 18 cm, so the radius is equal to r=18/2 = 9
Now we replace r by it's value, so we get:



And we get approximately

Hope this Helps :D
Answer:
14 trees is less than 640 inches