Answer:

Step-by-step explanation:
To be able to answer this question properly. I'll assume the length of the room is in meters.
So for the room, we have:


For the bed, we have:


First, we calculate the surface area of the room.

Convert all units to cm


Next, we calculate the area of the bed


The area of the space left is the difference between A1 and A2



I think it is b but wait till someone else answers to
The answer is 4. The question is what is 2+2?
Answer:
The surface area of the rectangular pyramid is 
Step-by-step explanation:
we know that
The surface area of the rectangular prism is equal to the area of the rectangular base plus the area of the four triangular faces
so
![SA=(8)(5)+2[14.75]+2[\frac{1}{2}(8)(5)]](https://tex.z-dn.net/?f=SA%3D%288%29%285%29%2B2%5B14.75%5D%2B2%5B%5Cfrac%7B1%7D%7B2%7D%288%29%285%29%5D)

