Suppose that revenue in dollars from the sale of x book bags is given by R(x) = 48x - 0.3x². Find the marginal revenue function, R'(x).
(a) Differentiate R(x) with respect to x.
(i) R'(x) = 48 - 0.6x
(ii) R'(x) = 48 - 0.3x
(iii) R'(x) = 48 - 1.2x
(iv) R'(x) = 48 + 0.3x