Find the length and direction (when defined) of u × v.u = - 
i + 
j + k, v = i + j + 2k
A. 8; 
i - 
j + 
k
B. 8; 
i - 
j - 
k
C. 2
; - 
i + 
j - 
k
D. 2
; 
i + 
j - 
k
Answer: D
Mathematics
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A. False B. True
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Rationalize the denominator. Assume variables represent non-negative values. 
A. 
B. 
C. 
D. 
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A. {(10, -9), (10, 9)} B. {(-10, -9), (-9, -10)} C. {(10, 9), (9, 10), (-10, -9), (-9, -10)} D. {(10, 9), (-10, 9), (10, -9), (-10, -9)}
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