Who is involved in the stimulus check please help me i really need help please

What are the soultion(s) to the quadratic equation 40- x^2=0

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

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.