Question

1. Convert: 3 ½ mi = ____ ft.

18,480

1508 ½

213

10 ½

Answer 1

Convert: 3 ½ mi = ____ ft.
5280 ft
I'd prefer to use a conversion factor: 1 = --------------
1 mile

Thus,


3 1/2 miles 5280 ft
---------------- * ------------ = 18480 ft (answer)
1 1 mile

Answer 2

One mile= 5,280 feet

Then you multiply that by 3 to get 15,840 feet. To cover that extra 1/2 mile, you divide 5,280 by 2 to 2,640 ft.

Finally you add 15,840 to 2,640 to get a total of 18,480 ft.