Parking charges at Superior Parking Garage are $5.00 for the first hour and $1.50 for each additional 30 minutes. If Margo has $12.50, what is the maximum amount of time she will be able to park her car at the garage?

So what you want to do is subtract $5 to 12.50 for the first hour so then you will have 7.50

After that you want to divides 7.50/1.50 so you can see how many hours you have left.

7.50/1.50=5

Then you want to multiple 5*30 to get your time and that is 2hrs and 30 min

Then add the hour for the first hour that you had and it would be 3hrs and 30 min

The maximum time she can park her car here is 3 1/2 hours (3 hours and 30 minutes).