9 One lap around a track is equal to one-eighth of a mile. A track star ran a distance of 11 laps in 15 minutes 30 seconds. What was the horse’s average speed in miles per minute?
The horse ran 11 (1/8) = 11/8 miles
And 15 min 30 sec = 15.5 min
So
Distance / Time = (11/8) miles / (15.5) min ≈ .089 miles per minute
1.4090 minutes average