Question

Parking in a student lot costs $3 for the first half hour and $1.75 for each hour thereatfer.A partial hour is charged the same as full hour.What is the longest time that a student can park in this lot for $10.00?

Answer 1

cost = 1st hr cost + 1.75*(# of additional hours)
C = 3 + 1.75x
10 = 3 + 1.75x
1.75x = 7
x = 4 hrs.