单选题 If an investor puts $ 5724/year, starting at the end of the first year, in an account earning 8 percent and ends up accumulating $ 500000, how many years did it take the investor?

A、

A. 87 years.
B、

B. 26 years.
C、

C. 27 years.

【正确答案】 C

【答案解析】I/Y=8; PMT=-5724; FV=500000; CPT N=27. Remember, you must put the PMT in as a negative (cash out) and the FV in as a positive (cash in) to compute either N or I/Y.