Find the length of the curve.x = 3 sin t + 3t, y = 3cos t, 0 ? t ? ?
A. 18
B. 12
C. 6
D. 3?
Answer: B
Mathematics
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Calculate the requested distance.The distance from the point S(1, -5, -1) to the plane 4x + 3y = 10
A. 
B. 
C. 
D. 
Mathematics
Add or subtract as indicated.(7x2 - xy - y2) + (x2 + 3xy + 6y2)
A. 6x2 - 4xy - 7y2 B. 8x2 + 2xy + 5y2 C. 7x2 + 3xy + 6y2 D. 8x2 + 4xy + 7y2
Mathematics
Solve the problem.The area A = ?r2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when 
A. 18? ft2/ft B. 9? ft2/ft C. 18 ft2/ft D. 81? ft2/ft
Mathematics
Find the potential function f for the field F.F = (y - z)i + (x + 2y - z)j - (x + y)k
A. f(x, y, z) = xy + y2 - xz - yz + C B. f(x, y, z) = xy + y2 - x - y + C C. f(x, y, z) = x(y + y2) - xz - yz + C D. f(x, y, z) = x + y2 - xz - yz + C
Mathematics