The market research department for an automobile company estimates that sales (in millions of dollars) of a new electric car will increase at the monthly rate of

S′(t) = 4e^-0.08t 0 ≤ t ≤ 24

t months after the introduction of the car. What will be the total sales S(t) t months after the car is introduced if we assume that there were 0 sales at the time the car entered the marketplace? What are the estimated total sales during the first 12 months after the introduction of the car? How long will it take for the total sales to reach $40 million?