Question: A car speeds up at a constant rate from 10 to 70 mph over a period of half an hour. Its fuel efficiency (in miles

A car speeds up at a constant rate from 10 to 70 mph over a period of half an hour. Its fuel efficiency (in miles per gallon) increases with speed; values are in the table. Make lower and upper estimates of the quantity of fuel used during the half hour.

Speed (mph) 10 Fuel efficiency (mpg)|| 15 20 30 40 50 60

Speed (mph) 10 Fuel efficiency (mpg)|| 15 20 30 40 50 60 70 18 21 23 24 25 26

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