Find the limit.
A. 9
B. -9
C. - 
D. 3
Answer: C
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Solve the problem.Use the formula D = 10.0 log (S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. A certain noise measures 106 decibels. If the intensity is multiplied by 100, how many decibels will the new noise measure? (Round to an appropriate number of significant digits.)
A. 108 decibels B. 212 decibels C. 10,600 decibels D. 126 decibels
Find the exact value of the trigonometric function.cot 
A. - 
B. - 
C. -1
D. - 
State whether the linear model shown in the graph is exact or approximate. Then find the equation of the line.
A. Exact; y = -x - 2 B. Approximate; y = -2x + 2 C. Approximate; y = -x - 2 D. Exact; y = -2x + 2
Find the product.(x + 3y)(x - 9y)
A. x2 - 6xy - 6y2 B. x2 - 9xy - 27y2 C. x2 - 6xy - 27y2 D. x - 6xy - 27y