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Mathematics, 10.12.2019 04:31 ScardeySpiderAlt

Amotor vehicle has a maximum efficiency of 39 mpg at a cruising speed of 40 mph. the efficiency drops at a rate of 0.1 mpg/mph between 40 mph and 50 mph, and at a rate of 0.4 mpg/mph between 50 mph and 80 mph. what is the efficiency in miles per gallon if the car is cruising at 50 mph

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