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?
third day (0.1+0.3)+0.3 or (0.1+0.3)*2 OR (0.1*2)+0.3 or (0.1*2)*2
4th 0.7*2 or 0.7+0.3 or 0.8*2 or 0.8+0.3 or 0.5*2 or 0.5+0.3 or 0.4*2 or 0.4+0.3=0.7(People will choose the smallest fine) ”作者: backlighting 时间: 2011-3-13 16:40
楼上的思路也清楚得很啊,谢谢 我发现我看题还是有点问题作者: JGMATJ 时间: 2011-3-13 16:44
对!!夏天的裙摆的思路也清楚得很啊!! 多谢!!!! 也感谢backlighting搜到别人的回答!!! 我发现我看题更是有问题!!! 多谢好人!!!!!!