Two circular signs are to be painted. If the radius of the larger sign is three times that of the smaller sign, how many times more paint is needed to paint the larger sign? (We can assume that a given amount of paint covers the same area on both signs.)	Choose the correct choice from the following answers:
A) 3
B) 9
C) 12
D) 15
E) 18
Let R be the radius of the smaller sign.   The area A of the smaller sign is A = piR^2.   The area of the larger sign is pi(3R)^2=9piR^2=9A.   Since the area is 9 times larger, we need 9 times more paint for the larger sign.   The answer is 9.
<result>B</result>
Two circular signs are to be painted. If the radius of the larger sign is three times that of the smaller sign, how many times more paint is needed to paint the larger sign? (We can assume that a given amount of paint covers the same area on both signs.)