NO.PZ2018062001000001
问题如下：
Jack estimates that the revenue of Theobald Co. will increase from $1000 to $2000 and profit will increase from $400 to $1200 in the following six-year from now on. The expected compounded annual growth rate of Theobald Co. is:
选项：
A.
Revenues:12%, profit 20%.
B.
Revenues: 20%, profit 12%.
C.
Revenues:20%, profit 25% .
解释：
A is correct.
For the company’s revenues, $2000=$1000 × (1+r)6, r =12.25%
For the company’s profit $1200= $400 × (1+r)6 , r=20.09%.
revenue 6年从1000涨到2000，所以增长率就是1000（1+r）^6=2000，如果从公式的角度可以理解为PV（1+r）^n=FV。从计算器的角度就是PV=-1000，难道不应该是正1000吗？
