The number 301 can be written as?

This is so hard and it’s for a test

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

Aright triangle can also be a(n) triangle.