math
posted by christina .
A classroom measures 32ft long, 25ft wide, and 9ft high. The combined area of doors and window is 140 ft^2. What is the remaining area of the four walls of the room?

Total WALL area is
2(32x9) + 2(25x9)  140 ft^2.
Do the calculation.
Floor and ceiling areas are not included. 
886 sp. ft.

its really easy... just find the area of all the wall except for the floor and ceiling. and subtract that by 140ft

If all of the following operations are present in math calculation which of them should always be done first??

140
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