Match the vector equation with the correct graph.
r(t) = -3ti + 2tj + 2tk; 0 ? t ? 1
A. Figure 3
B. Figure 1
C. Figure 5
D. Figure 8
Answer: A
Mathematics
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A. 7 B. 1440 C. 5040 D. 3.5
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A. 4x2 + 36x + 81 B. 4x2 - 81 C. 4x2 + 81 D. 4x2 + 18x + 81
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Find the moment or center of mass of the wire, as indicated.Find the center of mass of a wire that lies along the semicircle y = 
if the density of the wire is 
A. 
= 
?, 
= 
?
B. 
= 0, 
= 
?
C. 
= 0, 
= 
?
D. 
= 
?, 
= 
?
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