Solve the problem.A certain noise produces 
of power, designated as S. What is the decibel level of this noise? 
where S0 is 10-12 watt/m2. (Round to the nearest decibel.)
A. 9 decibels
B. 79 decibels
C. 89 decibels
D. 204 decibels
Answer: C
Mathematics
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Write a chain rule formula for the following derivative.
for z = f(r, s); r = g(t), s = h(t)
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
D. 
= 
+ 
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Express the number in scientific notation.0.000315
A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5
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Solve the equation symbolically.27t - 1 = 3t + 14
A. 
B. - 
C. 
D. 
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Solve by using the quadratic formula.x2 + 3x - 54 = 0
A. -9, 6 B. -6, 9 C. -9, 1 D. 9, 6
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