Question

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. book on the fourth day it is overdue?

Answer 1

It the fourt day the total is 0.70 because
Day one: .10
Day two: you double it so .20
Day three: you double it again so .40
Day four: you add .30 so .70 is the total