Solve the problem.Find a unit vector perpendicular to plane PQR determined by the points P(2, 1, 3), Q(1, 1, 2) and R(2, 2, 1).
A. 
(-i - 2j - k)
B. 
(i - 2j - k)
C. 
(i - 2j + k)
D. 
(i - 2j - 2k)
Answer: B
Mathematics
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A. 2.4x + 11.3 B. -2.4x + 3.9 C. -2.4x + 3.9 + 2y D. -2.4x - 3.9 - y
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Use a compass and straight edge to bisect ?A
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Graph the function.y = -cot 
A. 
B. 
C. 
D. 
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If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.1251/3
A. 1875 B. 15 C. 625 D. 5
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