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一道郁闷的Prep ....
A certain library assesses fines for overdue books as follows. On the first day that a book is overdue, the total fine is $0.10. For each additional day that the book is overdue, the total fine is either increased by $0.30 or doubled, whichever results in the lesser amount. What is the total fine for a book on the fourth day it is overdue?
答案是$0.70. 我多给人家算了,$0.80....
多谢！！！！ |
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