The profit (in dollars) from the sale of x infant car seats is given by
P(x) = 45x - 0.025x2 - 5,000 0 ≤ x ≤ 2,400
(A) Find the average change in profit if production is changed from 800 car seats to 850 car seats.
(B)Use the four-step process to find P(x).
(C) Find the profit and the instantaneous rate of change of profit at a production level of 800 car seats, and write a brief verbal interpretation of these results.