Answer:
y = 11.2 in
Step-by-step explanation:
Given a tangent and a secant from an external point to a circle, then
The square of the measure of the tangent is equal to the product of the external part and the entire secant, that is
5(5 + y) = 9²
25 + 5y = 81 ( subtract 25 from both sides )
5y = 56 ( divide both sides by 5 )
y = 11.2
