dollars where v is the speed of the train in miles per hour Note that the cost goes up as the square of the speed Other costs

Question

dollars where v is the speed of the train in miles per hour Note that the cost goes up as the square of the speed Other costs including labor are 480 per hour How fast should the train travel on a 420 mile trip to minimize the total cost for the trip The cost per hour for fuel to run a train is 8 Write the total cost C as a function of the speed v C v Use integers or fractions for any numbers in the expression

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