A present value of a machine is $1200. Its value depletion rate is 10% per annum then find the machine value after 2 years?	Choose one:
A) $ 972 B) $ 810 C) $ 915 D) $ 715 E) $ 795

Rationale: "p = $ 1200 r = 10 % t = 2 years machine value after 2 years = p [ ( 1 - r / 100 ) ^ t ] = 1200 * 9 / 10 * 9 / 10 = $ 972 answer is a"
Answer: A