Margarita knows that her score on the final exam will be a quadratic function of the amount of time she studies. If she studies for 10 hours, she will score 50 %. If she studies for 20 hours,
she will score 85 %. If she studies for 35 hours, she will score 80 % (her score decreases due to
overwork and stress from lack of sleep).
a) How much should she study to maximize her score on the exam?
b)What is her maximum possible score on the exam?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.