5 divided by 1/3 Help me plz 15 point for who ever gets it answered

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811