In testing their recording devices, a team of seismologists positioned two of the devices 2000 feet apart, with the device at point A to the west of the device at point B. At a point between the devices and 200 feet from point B, a small amount of explosive was detonated. A second explosion is to be carried out at a point directly north of point B. How far north should the site of the second explosion be chosen so it is directly north of point B? Imagine what this would look like on the coordinate plane... what do we know about the] graph and/or equation of this hyperbola?