The compound interest on $2000 at 10% per annum is $662. The period(in years) is?	Pick one:
A) 2
B) 3
C) 4
D) 5
E) 6

Rationale: a = p ( 1 + r / 100 ) ^ t 2662 = 2000 ( 1 + 10 / 100 ) ^ t ( 11 / 10 ) ^ t = 2662 / 2000 ( 11 / 10 ) ^ t = ( 11 / 10 ) ^ 3 t = 3 years answer is b
Answer: B