Marita is decorating the prism at the right with tiles. each tile is 1 square foot. each tile costs $ 0.45. how much will it cost marita to tile the whole prism?

First, we need to calculate the surface area of the prism, to know how much space we need to cover. An important fact to keep in mind is that with a cuboid, there are three pairs of identical faces. This means that there are:
Two faces with a surface area of 2×1=2ft²
Two faces with a surface area of 3×2=6ft²
and two faces with a surface area of 1×3=3ft²
So, the total surface area of the shape is:
2(2)+2(6)=2(3)
=4+12+6
=22ft²
Knowing that each tile costs 1ft², then Marita will need 22÷1=22 tiles. Therefore, the total cost of tiling the whole prism is 22×0.45= $9.90

The answer is