We can divide the given image into two parts, as follows:
Then, its area will be the sum of the areas of the rectangle and the square.
The area of the rectangle is:
[tex]9ft\cdot4ft=9\cdot4ft^{2}=36ft^{2}[/tex]
And the area of the square is:
[tex]4ft\cdot4ft=4\cdot4ft^{2}=16ft^{2}[/tex]
Now, we need to sum those two areas. We obtain:
[tex]36ft^{2}+16ft^{2}=(36+16)ft^{2}=52ft^{2}[/tex]
Therefore, the answer is:
52 ft²
