A student scores 72 out of 100 on a test. If the maximum
score on the next test is also 100
points , what score does the student need to maintain at least an average of
78?

I have one one question. Parking in a studenting lot costs $3 for the first hour half and $1.50 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time a student can park for in this lot for $9?