Solve the problem.A certain noise measures 63 decibels. If the sound pressure is multiplied by 10, how many decibels will the new noise measure? L = 20 log 
, where p0 = 2 × 10-5 Pa.
A. 63 decibels
B. 73 decibels
C. 630 decibels
D. 64 decibels
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Simplify the expression. Assume that all variables are positive when they appear.
A. -20
B. - 
C. -9
D. - 
Mathematics