What amount does an investor receive if the investor invests $3000 at 10% p.a. compound interest for two years, compounding done annually?  Choose the most appropriate option
A) $ 3420 B) $ 3630 C) $ 3870 D) $ 4040 E) $ 4220

Rationale: "a = ( 1 + r / 100 ) ^ n * p ( 1.1 ) ^ 2 * 5000 = 1.21 * 5000 = 3630 the answer is b ."
Answer: B