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 |
70 cents a day |
Eric rented 5 books and was charged $29.50. How many days did he rent the books for?
$1 = 100¢
$29.50 = 29.50 x 100 = 2950¢
Amount that Eric paid for each book
= 2950 ÷ 5
= 590¢
Amount that Eric paid for each book for renting for the first 8 days
= 8 x 30
= 240¢
Additional amount that Eric paid for each book for renting for additional days
= 590 - 240
= 350¢
Number of additional days that Eric rented for each book
= 350 ÷ 70
= 5
Total number of days that Eric rented the books
= 8 + 5
= 13
Answer(s): 13