Solve the problem.Find the mass of a wire of density ?(x, y, z) = 4z and has the shape of the helix 
y = 3 sin t, z = 4t
A. 40?2
B. 80?2
C. 8?2
D. 
?2
Answer: A
Mathematics
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Solve the problem.Consider the region R bounded by the graph of f(x) = 
on the interval [0, 3]. Find the volume of the solid formed when R is revolved about the x-axis.
A. 
B. 
+ 6
C. 
D. 
Mathematics
Write percent as decimal.629%
A. 0.629 B. 62.9 C. 629 D. 6.29
Mathematics
Solve the problem.Find the sum of the first 11 terms of the arithmetic sequence 1, 3, 5, . . . .
A. 132 B. 100 C. 121 D. 144
Mathematics
Decide whether the pair of lines is parallel, perpendicular, or neither.3x - 6y = -418x + 9y = 4
A. parallel B. perpendicular C. neither
Mathematics