In Problem find derivatives with the numerical derivative feature of a graphing calculator.
Profit suppose that the profit function for the monthly sales of a car by a dealership is
P(x) = 500x - x2 - 100
where x is the number of cars sold. What is the instantaneous rate of change of profit when
(a) 200 cars are sold? Explain its meaning.
(b) 300 cars are sold? Explain its meaning.