Can someone help me please ?!? :)

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

Multiply. write your answer in simplest form. 3/8 x 5/7

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers