Find the simple interest on $10000 at 9% per annum for 12 months?  Select.
A) $ 410  B) $ 500  C) $ 650  D) $ 710  E) $ 900

Rationale: p = $ 10000 r = 9 % t = 12 / 12 years = 1 year s . i . = p * r * t / 100 = 10000 * 9 * 1 / 100 = $ 900 answer is e
Answer: E