Your muscle car's gas mileage (in miles per gallon) is given by: _ 3000 M (S) s+360031 Where 5 is the car's speed in miles per hour. At approximately what speed is the car's gas mileage maximized? A. 75 miles per hour B. 60 miles per hour C. 55 miles per hour D. 80 miles per hour E. 100 miles per hour