Anyone able to help me with this?

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?