Final answer:
The equation represents a circle with center (-8,-9) and radius 13.
Step-by-step explanation:
The equation given is of the form (x-h)^2 + (y-k)^2 = r^2, which represents a circle with center (h,k) and radius r. In this equation, (x+8)^2 represents the squared difference between x and -8, and (y+9)^2 represents the squared difference between y and -9. The equation represents a circle centered at (-8,-9) with a radius of 13. Therefore, the range of the signals is a circle with center (-8,-9) and radius 13.