Question 12 out of 2 pointsIn the standard equation of a circle, (x - h)2+ (y - k)2= r2, what does (h, k) represent?

Question 20 out of 2 pointsThe hospital provides ambulance service within a 30 mile radius of the hospital. If this service area is represented graphically, with the hospital located at (0, 0), what is the equation that represents the service area?

=

Question 30 out of 2 pointsWrite the standard equation of the circle with center (2, 3) and a diameter of 12.