4/21120 = 0.00018939
21120
5280 feet = 1 mile so 21120 feet = 21120/5280 = 4 miles.
21120
21120!
21120 ft/4 hours = 4 miles/4 hour = 1 mph
0.25
4
21120 feet
21120 feet
4 miles
5280*4=21120 ft.
There are 5,280 feet in a mile. To convert 21,120 feet to miles, you would divide 21,120 by 5,280. This equals 4 miles.