our client has agreed to allow all patients with a balance of 7500 to have a 10 month payment plan your patient have 6900 how much will the payments be??

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?