Simplify.
A. 
B. - 
C. - 
D. 
Answer: C
Mathematics
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Find the center of mass of the wire that lies along the curve r and has density ?.r(t) = (3t2 - 1)i + 6tk, -1 ? t ? 1; 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the line integral of f(x,y) along the curve C.f(x, y) = cos x + sin y, C: y = x, 0 ? x ? 
A. 
B. 2
C. 0
D. 2
Mathematics
Integrate the function.
dx
A. ln 
+ 
ln 
+ tan-1 
+ C
B. 6 ln 
- 
ln 
- tan-1 x + C
C. 6 ln 
+ ln
+ sin-1 
+ C
D. 6 ln 
+ 
ln 
+ 
tan-1 
+ C
Mathematics
Factor, if possible.x3 - 64
A. (x + 4)(x2 - 4x + 16) B. (x - 4)(x2 + 4x + 16) C. (x + 64)(x2 - 1) D. (x - 4)(x2 + 16)
Mathematics