Joanne is looking for a job as a mechanic and plans to distribute business cards at job fairs related to this industry. Her local printer charges $23 per 100 cards, and sells them only in sets of 100.
a. How many cards must Joanne purchase if she needs approximately 150 cards?
b. How much will the cards cost her, including 8% sales tax?
c. If the number of sets of 100 cards is represented by x, express the cost, with 8% sales tax, of the cards, r(x), as a function of x.