What is the radius of a circle whose equation is x2+y2-10x+6y+18=0 ? 2 units 4 units 8 units 16 units

Write properties of circle: classify: circleequation in general form: x^{2} + y^{2} - 10 x + 6 y + 18 = 0equation in standard form: (x - 5)^{2} + (y + 3)^{2} = 16center: (5,-3)radius: 4diameter: 8area: 16 \picircumference: 8 \pidomain: 1 \leq x \leq 9range: -7 \leq y \leq 1