1.	Find the distance between A(-2, 0, 4) and B(6, 1, 1).
		A.	units	B.	units
		C.	units	D.	units
		Hint
	2.	Find the midpoint of the line with endpoints of (-4, -2, 4) and (3, 7, 2).
		A.	(-0.5, 2.5, 3)	B.	(-3.5, -4.5, 1)
		C.	(-1, 4, 2)	D.	(-4, 2, 3)
		Hint
	3.	One airplane has coordinates of (15, 25, 62) and a second airplane has coordinates of (2, -14, 92). How far apart are the two planes?
		A.	155.2	B.	19.1
		C.	50.9	D.	146.8
		Hint
	4.	Find the midpoint of the segment with endpoints P(0, 0, 4) and Q(0, -1, 6).
		A.	(0, -2, 20)	B.	(0, -0.5, 5)
		C.	(0, -1, 10)	D.	(0, 0.5, -1)
		Hint
	5.	Find the midpoint of the segment with endpoints R(20, -2, 18) and S(19, -8, 40).
		A.	(19.5, -5, 29)	B.	(-19.5, 5, -29)
		C.	(39, -10, 58)	D.	(78, -20, 116)
		Hint