To solve, put each answer in terms of ft/min. Do this by converting all distances to feet and times to minutes, the dividing feet by minutes. A) \(18/20=9/10\) ft/min. B) To get 2.5 hrs to mins, multiply by 60. \(2.5*60=150\) \(90/150=3/5\) ft/min. C) To get feet from yards, multiply yards by 3. \(20*3=60\) \(1.5*60=90\) \(60/90=2/3\) ft/min. D) \((11/3)*3=11\) \(11/15=11/15\) ft/min. Now compare the fractions to determine the largest and fastest is 9/10 ft/min, or A.
