The circle below is centered at the point (2, -1) and has a radius of length 3. What is its equation?

O A. (x + 2)2 + (- 1)2 = 32
O B. (x - 1)2 + (y + 2)2 = 9
O C. (x - 2)2 + (y + 1)2 = 32
O D. (x + 1)2 + (Y - 2)2 = 9

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm