A box needs to be decorated to use the proper and apply. The bottom at the back of the box do not need to be decorated. What is the surface area of the block that needs to be decorated?
To find the surface area of the block that needs to be decorated, we need to account for all the sides of the box except for the bottom and the back.
Let's assume the box has dimensions: length (L), width (W), and height (H).
The surface area of the bottom of the box is L x W.
The surface area of the back of the box is L x H.
Therefore, the total surface area of the block that needs to be decorated is:
2(L x W) + 2(L x H) + (W x H)
Note that we multiply the surface area of the bottom and the back by 2 because there are two sides with those dimensions.
In conclusion, the surface area of the block that needs to be decorated is 2(L x W) + 2(L x H) + (W x H).