To find the answer, we can first convert all their speed to feet per second.
Also note that:
1 miles = 5280 feet
1 minute = 60 seconds
We can then proceed to find the answer:
Debbie: 10 ft/s
Stephanie: 131/10 = 13.1 ft/s
Jessica: 1x5280/440 = 12ft/s
Ron: 547/1x60 = 9.1166..ft/s
Therefore, Stephanie has the highest speed (13.1 ft/s)
Hope it helps!