Question

I have no clue on how to do this, help?

Answer 1

`40 {ft}^(2)`

Explanation:

You will get the shaded area by subtracting the smaller rectangle from the area of the larger restangle.

The larger rectangle's area would be

`10 \: ft \: * 8 \: ft = 80 \: {ft}^(2) \\`

The smaller rectanlge's area is

`5 \: ft \: * \: 8ft \: = 40 \: {ft}^(2)`

The shaded region would be

`80 - 40 = 40 {ft}^(2)`