A book rental shop rented out books and the rate of rental charges are shown in the table.
Number of days |
Rates |
After the first 8 days |
30 cents a day |
After 8 days |
80 cents a day |
Brandon rented 2 books and was charged $19.20. How many days did he rent the books for?
$1 = 100¢
$19.20 = 19.20 x 100 = 1920¢
Amount that Brandon paid for each book
= 1920 ÷ 2
= 960¢
Amount that Brandon paid for each book for renting for the first 8 days
= 8 x 30
= 240¢
Additional amount that Brandon paid for each book for renting for additional days
= 960 - 240
= 720¢
Number of additional days that Brandon rented for each book
= 720 ÷ 80
= 9
Total number of days that Brandon rented the books
= 8 + 9
= 17
Answer(s): 17