Stephanie runs 9 feet per second , ron runs 255 feet in 22 seconds , liz runs 1 mile in 362 seconds , emily runs 605 feet in 1 minute , who runs the fastest

To compare their speeds we must first display them so that they each represent feet per second.

To do this simply divide total distance(feet) by time(seconds). This gives you there feet per second.

Stephanie: 9/s
Ron: 255/22 or 11.590/s
Liz 1000/362 or 2.762/s
Emily 605/60 or 10.083/s
Therefore Ron ran the at the fastest speed.