GWD18-30 MATH帮忙看看:)

Q30:

From May 1 to May 30 in the same year, the balance in a checking account increased.  What was the balance in the checking account on May 30 ?

(1)   If, during this period of time, the increase in the balance in the checking account had been 12 percent, then the balance in the account on May 30 would have been $504.

(2)   During this period of time, the increase in the balance in the checking account was 8 percent

答案是Ｃ　偶觉得条件一可以求出来啊？难道我又理解错了

翻译一下：

Q30:

From May 1 to May 30 in the same year, the balance in a checking account increased.  What was the balance in the checking account on May 30 ?

从同一年的5.1到5.30，一个经常帐户的余额增加了，问经常帐户在5.30的余额是多少？

(1)   If, during this period of time, the increase in the balance in the checking account had been 12 percent, then the balance in the account on May 30 would have been $504.

如果，在这段期间，经常帐户的余额增加了12％，那么5.30时帐户余额将是$504 （也就是 期初帐户余额*1.12＝504，求出期初帐户余额）

(2)   During this period of time, the increase in the balance in the checking account was 8 percent

这段期间，此经常帐户的余额增加了8％

所以，期末经常帐户余额＝期初帐户余额*1.08

以下是引用爱睡觉的猫在2005-12-10 15:49:00的发言：
明白了.谢谢hitizc mm  偶数学还差哦 还有12天就要考了 ,真是.....

祝考试顺利！这两天突击一下应该没问题的！

（我还没报名呢）