Find the compound interest on $100000 in 2years at 4% per annum, the interest being compounded half-yearly?	Choose the correct choice
A) $ 645.56	B) $ 824.32	C) $ 954.26	D) $ 745.69	E) $ 8243.21

Rationale: "principle = $ 10000 rate = 2 % half yearly = 4 half years amount = 100000 * ( 1 + 2 / 100 ) ^ 4 = 100000 * 51 / 50 * 51 / 50 * 51 / 50 * 51 / 50 = $ 108243.21 c . i . = 108243.21 - 100000 = $ 8243.21 answer is e"
Answer: E