问题
单项选择题
An investor invested $ 10000 into an account five years ago. Today, the account value is $18682. What is the investor's annual rate of return on a continuously compounded basis（）
A. 13.31%.
B. 11.33%.
C. 12.50%.
答案
参考答案：C
解析：
In (18682/10000)=0.6250/5=12.50%
Or:
(18682/10000)1/5=1.133143
In(1.133143)=12.4995%