Question

If you are driving at a rate of 55 miles per hour, about how many feet per second are you traveling?

Answer 1

1 mile = 5280 feet

 so 55 miles = 5280*55 = 290,400 feet per hour

 there is 3600 seconds per hour

290,400 / 3600 = 80.6666, rounded to 81 feet per second