What is the elevation from boat to top of lighthouse if boat is 220 meters from lighthouse and lighthouse is 100 meters tall

Could somebody me with this radical simplification?

In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find: b the length of the angle bisector of angle ∠a.

Side xy of triangle xyz is extended to point w, creating a linear pair with ∠wyz and ∠xyz. measure of an exterior angle what is the value of x? 64 80 100 180