If the radius of a circle is increased by 12%, then the area of the circle	Pick:
A) decreases by 25.44 %	B) increases by 25.44 %	C) no change in area	D) decreases by 12 %	E) none

Rationale: a 1 = pi ( 100 ) ^ 2 a 2 = pi ( 112 ) ^ 2 so ( a 2 - a 1 ) / a 1 * 100 = 25.44 answer : b
Answer: B