A company has found that the profit in dollars from the

Question

A company has found that the profit (in dollars) from the sale of x ovens is given by

P(x) = -0.03x³ + 0.42x² + 240x + 18254

(a) Determine the exact profit from the sale of the 39^th oven.

(b) Use the marginal profit to estimate the profit from the 39^th oven sold.