Can u guys pls help me on this question and pls explain how u got the answer

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?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b