What is the value of 5s in 155,523,962

Which of the following can be used to explain a statement in a geometric proof?

Plz hurry evaluate the expression a+b where a=8 and b=19

This circle is centered at the origin, and the length of its radius is 6. what is the circle's equation? a. x^2+y^2=36 b x^2+y^2=6 c x+y=36 d x^6+y^6=1