Find the compound interest on $30000 in 2years at 4% per annum, the interest being compounded half-yearly? Choose the correct choice from the following answers.
A) $ 645.56	B) $ 824.32	C) $ 954.26	D) $ 2472.96	E) $ 1020.45

Rationale: "principle = $ 10000 rate = 2 % half yearly = 4 half years amount = 30000 * ( 1 + 2 / 100 ) ^ 4 = 30000 * 51 / 50 * 51 / 50 * 51 / 50 * 51 / 50 = $ 32472.96 c . i . = 32472.96 - 10000 = $ 2472.96 answer is d"
Answer: D