I need help please asp

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.