What is the quotient of 75 and 2.4

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?

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

Pls never taught i’m really confused and i rlly need