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 7 days |
50 cents a day |
After 7 days |
70 cents a day |
Elijah rented 4 books and was charged $33.60. How many days did he rent the books for?
$1 = 100¢
$33.60 = 33.60 x 100 = 3360¢
Amount that Elijah paid for each book
= 3360 ÷ 4
= 840¢
Amount that Elijah paid for each book for renting for the first 7 days
= 7 x 50
= 350¢
Additional amount that Elijah paid for each book for renting for additional days
= 840 - 350
= 490¢
Number of additional days that Elijah rented for each book
= 490 ÷ 70
= 7
Total number of days that Elijah rented the books
= 7 + 7
= 14
Answer(s): 14