23) Seven days ago, the gas tank on Rosa's car was filled with 20 gallons of gasoline. Today there are 6 gallons of gasoline.
A) What integer represents the change of gasoline in the past seven days? (Started at 20, ended at 6)
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B) What is the mean change in gasoline in gallons per day? (Change in gasoline over 7 days)
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C) What is the fuel efficiency, in miles per gallon, of Rosa's car if she drove 490 miles in the past seven days?
(490 miles driven with the change in gasoline)
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