What is the distance between point P(–2, 1, 3) and point Q(–1, 4, –2) to the nearest tenth?
35.1 units
18.4 units
9.3 units
5.9 units
2. If A(2, 0, –1), B(–1, 2, –3), C(0, 4, –2), and D(3, –1, 1) are points in a three-dimensional coordinate system, which segment is longest?
segment AB
segment BC
segment CD
segment DA
3. What are the coordinates of the midpoint of the segment joining A(2, –3, 1) and Z(–6, 3, 1)?
(–4, 3, 0)
(8, 6, 0)
(–4, 0, 2)
(–2, 0, 1)
4. If points P(6, 0, 4), Q(3, 2, 1), and R are collinear such that PQ = QR, which of the following are the coordinates of point R?
(0, 4, –2)
(–3, 2, –3)
(1, –2, 0)
(4, 1, –3)
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