A student works in a bookstore where he is required to work at least four and at most five days a week, at least one of which has to be a weekend day (Saturday or Sunday). How many different weekly work schedules can this student have?

Suppose that your schedule for next semester must consist of one natural science class, one liberal arts class, one humanities class, and one physical science class. How many ways can you make up your schedule if you can choose from 3 natural science classes, 4 liberal arts classes, 6 humanities classes and 3 physical science classes?

To fulfill certain requirements for a degree, a student must take one course each from the following groups: health, civics, critical thinking, and elective. If there are two health, five civics, three critical thinking, and ten elective courses, how many different options for fulfilling the requirements does a student have?

A bus company believes that it will need the following numbers of bus drivers during each of the next five years: 60 drivers in year 1; 70 drivers in year 2; 50 drivers in year 3; 65 drivers in year 4; and 75 drivers in year 5. At the beginning of each year, the bus company must decide how many drivers to hire or fire. It costs $4000 to hire a driver and $2000 to firea driver. A driver’s salary is $10,000 per year. At the beginning of year 1, the company has 50 drivers. A driver hired at the beginning of a year can be used to meet the current year’s requirements and is paidfull salary for the current year. a. Determine how to minimize the bus company’s salary, hiring, and firing costs over the next five years. b. Use SolverTable to determine how the total number hired, total number fired, and total cost change as the unit hiring and firing costs each increase by the same percentage.