Answer: 59 feet per second
Explanation:
I'm assuming you made a typo and meant to type 'how many feet per second'
The speed of the Jackrabbits is 40 miles per hour.
We know that
1 mile = 5280 feet
1 hour = 3600 seconds
40 miles = (40 × 5280) feet = 211200 feet
211200/3600 = 58.67 feet per second
The speed of the Jackrabbits to the nearest whole number is 59 feet/second.