Answer: 88ft/sec
Explanation
We want to convert from 60 miles per hour to ft per second.
Therefore, considering that 5280 ft = 1 mile, and 3600 seconds = 1 hour, then:
[tex]60\frac{miles}{hour}\cdot\frac{5280ft}{1mile}\cdot\frac{1\text{ hour}}{3600sec}=88\frac{ft}{sec}[/tex]