Suppose That You Can Hire Your Mechanic for Up to Six

question 20

Multiple Choice

Suppose that you can hire your mechanic for up to six hours.The total benefit and total cost functions are B(H) = 300H - 20H² and C(H) = 55H + 60H².The corresponding formulas for marginal benefit and marginal cost are MB(H) = 300 - 40H and MC(H) = 55 + 120H.For how many hours should you hire your mechanic?

• A) 1.53 hours
• B) 0.65 hours
• C) 6 hours
• D) 0 hours