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by ruplun » Fri Jul 15, 2011 7:49 am
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 , which 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
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by MBA.Aspirant » Fri Jul 15, 2011 8:03 am
which[ever] results in the lesser amount

0.10, 0.2, 0.4, 0.7
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by Anurag@Gurome » Fri Jul 15, 2011 9:48 am
ruplun wrote: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 , which results in the lesser amount . What is the total fine for a book on the fourth day it is overdue?
Total fine after day 1 = $0.10
Total fine after day 2 = $0.20 as 2*(0.10) < (0.10 + 0.30)
Total fine after day 1 = $0.40 as 2*(0.20) < (0.20 + 0.30)
Total fine after day 1 = $0.70 as (0.40 + 0.30) < 2*(0.40)

The correct answer is B.
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