I NEED A SMART BRO FOR THIS.
Ruby red paint costs $0.50 per square inch. A ball is painted ruby red and costs $100.00 to paint. What is the diameter of the ball? Round to the nearest tenth of an inch.
A.4.0 in.
B.5.6 in.
C.8.0 in.
D.16.0 in.

Question

I NEED A SMART BRO FOR THIS.
Ruby red paint costs $0.50 per square inch. A ball is painted ruby red and costs $100.00 to paint. What is the diameter of the ball? Round to the nearest tenth of an inch.
A.4.0 in.
B.5.6 in.
C.8.0 in.
D.16.0 in.

anonymous · Answer

0.50 * 100.00 right bro?

anonymous · Answer

Yeah thats what i just got with my calculator, but its not an option. This is weird bro, how do i get my answer? o:

anonymous · Answer

Simplify?

anonymous · Answer

The surface area of a sphere is inaccurate above. It's:
$$A=4\pi r^2$$ Once you find the area, plug into that equation and solve for r. Then double it since d=2r.

anonymous · Answer

i got 8.0 inches.

anonymous · Answer

Thats what I got as well.

anonymous · Answer

If two lefts make a right, Thanks again bro's!

primeralph · Answer

I used the area of a circle. That was wrong.