The speed of a car in kilometres per hour, at a time of t hours is represented by v(t) = 3t + t². Gasoline consumption of the car, c litres per kilometre, at a speed of v kilometres per hour is 0.1)². represented by c(v) = (500- a. State the function c(t). b. Use the function in part a) to estimate the instantaneous rate of change of gasoline consumption at 4 hours.

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