The center of a circle is at (–10, 6) and it has a radius of 4. what is the equation of the circle? question 9 options: (x – 10)2 + (y + 6)2 = 2 (x – 10)2 + (y + 6)2 = 16 (x + 10)2 + (y – 6)2 = 2 (x + 10)2 + (y – 6)2 = 16 the equation x2 + (y + 3)2 = 36 models the boundary on a local map for which darren can hear his friend tom on his two-way radio when darren is at home. how far (in miles) can tom walk from darren's home and still be heard? question 11 options: 3 miles 6 miles 2 miles 12 miles