Respuesta :

Answer:

A) 9.49 ft

Step-by-step explanation:

The area of the rectangle is:

[tex]A = (18\,ft)\cdot (5\,ft)[/tex]

[tex]A = 90\,ft^{2}[/tex]

The length of the square is:

[tex]l = \sqrt{90\,ft^{2}}[/tex]

[tex]l \approx 9.487\,ft[/tex]