I need the answer to the question and how

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.

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Which statement explains the relationship between corresponding terms in the table?