The name of questions that estimate large numbers are called questions

Which statement describes surface features called maria on the moon

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?

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x