Awall is 12 feet long and 8 feet tall. there is a square window 4 feet long in the wall. what is the area of the wall surface? 96 ft2 92 ft2 80 ft2 32 ft2

The answer is 80 ft2. This is because length x width= area. so, 12 x 8= 96. the area of the wall is 96, but we also have the window to subtract. The window is square, so the length and width are the same. So, we can do 4 x 4, and you get 16. We need to subtract the window from the wall, so, 96 - 16= 80. Add the ft 2, and you have 80 ft2. :) Hope this helps!!! :)

270 books in each shelves

Tha answers are c. 2 and d. 7.5 ; )