Suppose that it costs I + (0.0003)u3ir dollars per mile to
Chapter 4, Problem 79(choose chapter or problem)
Suppose that it costs I + (0.0003)u3ir dollars per mile to operate a truck at u miles per hour. If there are additional costs (such as the ddver's pay) of$10/hr, what speed would minimize the total cost of a 1000-mi trip?
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