Q+9p when q=18 and p=4 just the answer not how to solve

What is the solution to the inequality

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be