## Precalculus (6th Edition) Blitzer

RECALL: The standard form of a circle's equation is $(x-h)^2+(y-k)^2=r^2$, where $(h, k)$ is the center and $r$ is the radius. This means that the given equation is a circle whose center is at $(4, -6)$ and a radius of $\sqrt{25} = 5$ units. Thus, the given statement makes sense.