1.	Find the radius of the circle with equation (x - 4)2 + (y - 7)2 = 36.
		A.	4	B.	6
		C.	36	D.	7
		Hint
	2.	Find an equation of the circle that has a diameter with endpoints at (6, 10) and (-2, 4).
		A.	(x - 6)2 + (y - 10)2 = 100	B.	(x - 4)2 + (y - 3)2 = 53
		C.	(x - 2)2 + (y - 7)2 = 25	D.	(x + 2)2 + (y - 4)2 = 100
		Hint
	3.	Find an equation of the circle passing through A(2, 4), B(-2, 6), and O(0,0).
		A.	x2 + y2 = 40	B.	(x - 2)2 + (y - 4)2 = 20
		C.	(x - 3)2 + (y + 6)2 = 32	D.	(x + 1)2 + (y - 3)2 = 10
		Hint
	4.	The center of the circle with equation (x + 4)2 + (y + 15) 2 = 49 has coordinates ________.
		A.	(-4, -15)	B.	(4, 15)
		C.	(4, -15)	D.	(-4, 15)
		Hint
	5.	Which is an equation of the circle with center at (11, -19) and diameter 12?
		A.	(x - 11) 2 + (y + 19) 2 = 36
		B.	(x + 11) 2 + (y - 19) 2.= 144
		C.	(x + 11) 2 + (y - 19) 2 = 36
		D.	(x - 11) 2 + (y + 19) 2 = 144
		Hint