If circles x and y have the same area and circle x has a circumference of 18π, half of the radius of circle y is:
Pick:	A) 16	B) 4.5	C) 4	D) 2	E) 1
x be radius of circle x   y be radius of circle y   given:   pi*x^2 = pi*y^2   also,   2*pi*x = 18*pi   x = 9   thus y =9   y/2 = 4.5   Ans: 4.5
<result>B</result>
If circles x and y have the same area and circle x has a circumference of 18π, half of the radius of circle y is: