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一道GRE数学题,求详解Acertainlibraryassessesfinesforoverduebooksasfollows.Onthefirstdaythatabookisoverdue,thetotalfineis$0.10.Foreachadditionaldaythatthebookisoverdue,thetotalfineiseitherincreasedby$0.30or
题目详情
一道GRE数学题,求详解
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?
(A) $0.60
(B) $0.70
(C) $0.80
(D) $0.90
(E) $1.00
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?
(A) $0.60
(B) $0.70
(C) $0.80
(D) $0.90
(E) $1.00
▼优质解答
答案和解析
B
第一天0.1
第二天翻倍,0.2
第三天翻倍,0.4
第四天加0.3,0.7
第一天0.1
第二天翻倍,0.2
第三天翻倍,0.4
第四天加0.3,0.7
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