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Question

Annika borrowed a book from the library and forgot to return it on time. The library charges $0.25 per day for the first four days and $0.30 per day for all of the remaining days. If Annika had to pay the library $4.00, how many days late was her book?

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Answer 1

First four days:

$0.25 • 4 days = $1

$4 - $1 = $3

Next days:

$3 / $0.30 per day = 10 days

4 days + 10 days = 14 days