Respuesta :

120 feet per side. if you divide 479 by four, you get 119.75ft. But you round up to 120 ft. 
find the square root of 479 then round to the nearest foot. here is a link of how I figured out the problem with different numbers: https://youtu.be/EFVrAk61xjE (nearest 100th)
https://youtu.be/tr72uLg_bXc (nearest 10th)

the picture will help to explain and check you understanding of the problem.
Ver imagen omotolaROCKS