The building has 42 storage units that are a total of 5040 square feet. Twenty of the units are 8 by 4 feet each. If the remaining units are all the same size, what is the area, in square feet, for one of the remaining units?
8 * 4 = <T>multiply(8, 4)=32 square feet
20 * 32 = <T>multiply(20, 32)=640 square feet
5040 - 640 = <T>subtract(5040, 640)=4400 square feet
There are 42 - 20 = <T>subtract(42, 20)=22 remaining units
4400/22 = <T>divide(4400, 22)=200.0 square feet
One of the remaining units is 200 square feet.
