Optimal speed of a truck a truck gets 600x mpg when driven


Question: OPTIMAL SPEED OF A TRUCK A truck gets 600/x mpg when driven at a constant speed of x mph (between 50 and 70 mph). If the price of fuel is $3/gallon and the driver is paid $18/hour, at what speed between 50 and 70 mph is it most economical to drive?

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Mathematics: Optimal speed of a truck a truck gets 600x mpg when driven
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