We need to find the area for a square. To do this we will use the following expression:
[tex]\text{Area = l}^2[/tex]Where "l" is the length of the side of the square. Since this square has 12 feet in length, then it's area is:
[tex]\text{Area = 12}^2=144\text{ square ft}[/tex]The area of the square is 144 square ft. The correct option is b
