If you would like to know how far will the snail travel in 5 minutes, you can calculate this using the following steps:
2.35 feet per minute
d(t) = 2.35 feet * t minutes = 2.35 * t
t = 5 minutes
d(5) = 2.35 * 5 = 11.75 feet
The correct result would be d. d(t) = 2.35t; 11.75 ft.