Find the mass of the wire that lies along the curve r and has density ?.r(t) = 8i + (2 - 4t)j + 3tk, 0 ? t ? 2? ; ? = 4(1 + sin 9t)
A. 
+ 40? units
B. 
+ 40? units
C. 8? units
D. 40? units
Answer: D
Mathematics
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Mathematics