Answer: The general equation of a circle on a coordinate plane is given by (x - h)^2 + (y - k)^2 = r^2, where (h, k) is the center of the circle and r is the radius. From the information provided in the image, we know that the center of the circle is at (0, 0) and the radius is 8. Plugging these values into the equation, we get:
(x - 0)^2 + (y - 0)^2 = 8^2 x^2 + y^2 = 64
So, the equation of the circle with center (0, 0) and radius 8 is x^2 + y^2 = 64.