Can someone me on these questions?

Me answer number 3plz explain how you do it

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

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?