Perform the indicated operation.15 lb 2 oz - 11 lb 7 oz
A. 4 lb 3 oz
B. 26 lb 11 oz
C. 4 lb 11 oz
D. 3 lb 11 oz
Answer: D
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Solve the equation by the zero-factor property.2k2 = -18k - 36
A. 
B. 
C. {-6, -12}
D. 
Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
- 2 ? x ? 2, about the x-axis (dimensions are in feet). How many cubic feet of fuel will the tank hold to the nearest cubic foot?
A. 2 B. 3 C. 8 D. 7
Solve the problem.On a Touch-Tone phone, each button produces a unique sound. The sound produced is the sum of two tones, given by y = sin (2?lt) and y = sin (2?ht)where l and h are the low and high frequencies (cycles per second) shown on the illustration.
The sound produced is thus given by y = sin (2?lt) + sin (2?ht)Write the sound emitted by touching the 4 key as a product of sines and cosines.
A. y = 2 sin (439?t) cos (1,979?t) B. y = 2 sin (2,106?t) cos (566?t) C. y = 2 sin (566?t) cos (2,106?t) D. y = 2 sin (1,979?t) cos (439?t)
Provide an appropriate response.Explain why the equation x2 = 4 has two real number solutions, while the equation 
has only one real number solution.
What will be an ideal response?