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29) The fuel efficiency F for a particular car is given by F(x) = -0.018x x + 1.548 x + 6.8 where x is the

29)

The fuel efficiency F for a particular car is given by

F(x) = -0.018x^x + 1.548 x + 6.8

where x is the speed of the car in miles per hour (mph) and F (x) is the corresponding fuel efficiency in miles per gallon (mpg)

A. What id the fuel efficiency if the cars speed is 60 mph?

b. What speed will yield the maximum fuel efficiency

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