Answer:
The length of the side of the square is 17 ft.
[tex]l=17ft[/tex]Explanation:
The Area of a square can be calculated using the formula;
[tex]A=l^2[/tex]Given that the area of the square is 289 sq ft, we can calculate the length of the sides by substituting the value of area A into the formula and solve for l;
[tex]\begin{gathered} A=l^2 \\ 289=l^2 \\ \text{square root both sides;} \\ l=\sqrt[]{289} \\ l=17 \end{gathered}[/tex]Therefore, the length of the side of the square is 17 ft.
[tex]l=17ft[/tex]