Your wage is determined directly by your employer. Departments are required to pay you at least the minimum wage, which is $7.25 per hour.
During your employment, you will receive an hourly wage for the time you work. You do not get paid for time spent commuting to and from your job. Your department may not add hours to your timecard as a way to pay you for a "bonus" or as part of an "early release" rule; this is considered misrepresentation of your working hours and is illegal. Your supervisor will determine the protocol for short breaks during working hours.