Answer:
y = 11.2 in
Step-by-step explanation:
The square of the tangent length is equal to the product of the lengths of the secant from the intersection with the tangent to the near and far circle intersection points.
9^2 = 5(5+y)
16.2 = 5+y . . . . . divide by 5
11.2 = y . . . . . . inches
