Solve the problem.A vibrating wire has a vertical displacement given by 
Assume b and t are constants. Write y as a cosine function of x.
A. y = cos(2?x - bt)
B. y = 4 cos(2?x + bt)
C. y = 8 cos(2?x + bt)
D. y = 4 cos(2?x - bt)
Answer: D
Mathematics
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, and let Ve be the volume of the ellipsoid 
. Find the quotient 
.
A. 4?
B. 8?
C. 
D. 
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A. 
B. 
C. 
D. 
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Simplify.(-9x2y)(-9x4y5)
A. 81x6y6 B. 81x8y5 C. -18x6y5 D. -81x6y5
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Find the sum of the series.
A. 48 B. 36 C. 26 D. 42
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