Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (6 cos t)i + (6 sin t)j, 0 ? t ? 
;C2: r(t) = 6j + tk, 0 ? t ? 1; ? = 3t3
A. 
units
B. 
?3 units
C. 
units
D. 3?3 units
Answer: C
Mathematics
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Rewrite the original fraction as an equivalent fraction with the given denominator.
= 
A. 
B. 
C. 
D. 
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