Mrs.Hilt traveled 21,120 feet. How may miles did she travel

Question

i need to know how many miles she traveled out of 21,120 feet

Answer 1

Hi Jaden:

 

Units, units,units ...
 
(miles/hour)(hours) = miles

(60 mph)(2 hours) = 120 miles
 
(inches/foot)(feet) = inches

(12 in/ft)(3.5 ft) = 42 inches
 
(cars/block)(blocks) = cars
(25 cars/block)(10 blocks) = 250 cars
.
.
.
 
Looking at the units and pretending they are individual fractions will tell you
most times how to manipulate the information given to obtain what you need.
 
(feet)(miles/feet) = miles
(21120)(1/5280) = 4 miles

Answer 2

There are 5280 feet in one mile.  If she traveled 21,120 feet then she traveled 21,120 ft*1mile/5280ft=4 miles