GMAT
题目
Sam invests a principal of $10,000, which earns interest over a period of years.
Quantity A
The final value of the investment after 2 years at 8% interest, compounded annually
Quantity B
The final value of the investment after 4 years at 4% interest, compounded annually
解析
本息和公式：
本息和 = P (1 + r/100n)^t
A列：r=8, t=2
= 10000 (1+8/100)^2
= 108 * 108
= 108^2
B列：r=4, t=4
= 10000(1 + 4/100)^4
= (104/10)^4
= 10.4^4 = 108.16^2
可以看出：A < B
因此，答案为选项B。
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