Restaurants typically pay wait staff an hourly wage lower than minimum wage. The wait staff is expected to make up the difference in tips. The minimum wage is $5.15 per hour and a restaurant pays the wait staff $4 per hour.
a) If a waitress works an 8-hour shift, write and solve an inequality that gives the total tips t in dollars that the waitress must earn in an 8-hour shift in order to meet or exceed the minimum wage.
b) If the waitress makes $10.40 in tips during an 8-hour shift, will she meet or exceed the minimum wage? By how much?
c) If the waitress makes $9.20 in tips during an 8-hour shift, will she meet of exceed the minimum wage? By how much?