Question

Parking in a student lot costs $2 for the first half hour and $1.75 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lost for $7?

Answer 1

The next 4 hrs cost $5
The student has $1 left which he can't use, so
The longest he can park for is 4 and 1/2 hrs