11.07.2015 Views

Mathematics and Society - OS X Lion Server

Mathematics and Society - OS X Lion Server

Mathematics and Society - OS X Lion Server

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(Both the car <strong>and</strong> the driver contribute to the amount of gasoline used.a)An air conditioner reduces gas mileage*by 9-20%.b) An automatic transmission reduces it by 2-15%.c) Vehicle "eight is the single most important item.A 2200 kg car takes twice as much gas to run as an1100 kg car.d) Emission controls lower fuel economy by 3-18%.e) Unnecessary acceleration can use up to 15% more fuel.f) A tuned car averages up to 10% better gas mileage.g) Cruising at 95 km/h instead of 110 km/h saves 15%,at 80 km/h instead of 110 km/h saves 25%.(Questions1) A driver getting 8 km/f at 110 km/h would be gettingcar were driven at 80 km/h.__________ if the2) Choosing a car with air conditioning <strong>and</strong> an automatic transmission could lowergas mileage by a maximum of about %.3) A person owns 2 cars--one 2000 kg <strong>and</strong> the other 1000 kg. If the 1000 kg car isgetting 12 km/f, the 2000 kg car is probably getting onlykm/f.4) Why are emission controls used if they lower fuel economy?2465) *HOW far might a tuned-up car go on the gas it takes to go 1000 km when untuned? (What is a good word for "mileage" in the metric system?Data from Clean Air <strong>and</strong> Your Car, Environmental Protection Agency

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