On a given day, the flow rateF(cars per hour) on a congested roadway is given byF = wherev is the speed of the traffic 31+0.07y? in miles per hour. What speed will maximize the flow rate on the road? Round your answer to the nearest mile per hour. 11 miles per hour 20 miles per hour 19 miles per hour D) 21 miles per hour 18 miles per hour

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