Science:Math Exam Resources/Courses/MATH104/December 2016/Question 06 (a)/Hint 1

Recall that if the cost is $C(q)$ as a function of the quantity $q$, then the average cost is ${\frac {C(q)}{q}}$ and the marginal cost is $C'(q)={\frac {dC}{dq}}(q)$.