The base of a cone is a circle.
The area of a circle is

.
Thus, the area of the base of a cone

.
The derivation of the formula for the area of a circle involves a bit of calculus, but if you'd like, I can walk you through it.
Answer:
Step-by-step explanation:
21/5*2000= 21*400= 8,400 pounds
I think 33.3% that he Chooses that
Answer:
y = 50 + 35x we dont know how many hours they worked
Step-by-step explanation: