Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (8 cos t)i + (8 sin t)j, 0 ? t ? 
;C2: r(t) = 8j + tk, 0 ? t ? 1; ? = 7t5
A. 
units
B. 
?5 units
C. 
?5 units
D. 
units
Answer: D
Mathematics
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Write with positive exponents only.
-3
A. 
B. 
C. 
D. 
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Provide an appropriate response.The diagonals of a 
intersect at their common midpoint.
A. trapezoid B. pentagon C. parallelogram D. rhombus
Mathematics
Find the intersection of the given intervals.(-?, 6) ? [-7, 15)
A. (-?, 15) B. [-7, 6) C. (-?, -7] D. (6, 15)
Mathematics
Simplify. Assume that all variables represent positive numbers.
A. 7.5x5z6
B. 15x5z6
C. 7.5x5yz6
D. 15x8z11
Mathematics