请教一道涛涛数学题，正确答案是不是有问题？

juan_fly

10.If $1,000 will be deposited in a bank account and I is the dollar amount of interest earned from the original deposit, represented as I = 1000 {(1 + r/100)ⁿ – 1}, and the annual interest rate is r percent, is r > 8 percent?

(1)   The deposit earns a total of $210 in interest in the first 2 years.

      （2）(1 + r/100)² > 1.15             

正确答案是D，我选A.（2）怎么就SUFFICENT了？请大家帮我澄清：是答案错了还是我错了？             

peter_860606

答案给错了。

INCHASEDREAM

If the question is IF r percent>8 percent,then 2 IS NOT correct.

From 2/ we could make r >7.XXXX then r >8% ,right ?

jasonleo

弱弱的问句 ：是r>8 percent,还是r>8? 若是前者，D，若是后者A。