A particular automobile operates at an efficiency of 10%. Suppose that 20 gallons of gasoline are put into the auto's tank. Of this 20 gallons, how much will be "wasted" , i.e., how much will be consumed to produce exhaust heat and in other ways that do not actually get the car down the road?
A) 10 gallons
B) 20 gallons
C) 19 gallons
D) 2 gallons
E) 18 gallons
Correct Answer:
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