A present value of a machine is $900. Its value depletion rate is 10% per annum then find the machine value after 2 years?
Pick one
A) $ 900	B) $ 810	C) $ 915	D) $ 715	E) $ 729

Rationale: "p = $ 900 r = 10 % t = 2 years machine value after 2 years = p [ ( 1 - r / 100 ) ^ t ] = 900 * 9 / 10 * 9 / 10 = $ 729 answer is e"
Answer: E