Solve the problem.Use the formula 
where the loudness of a sound in decibels is determined by I, the number of watt/m2 produced by the soundwave, and 
A certain noise produces 
of power. What is the decibel level of this noise? Round to the nearest decibel.
A. 206 decibels
B. 80 decibels
C. 9 decibels
D. 90 decibels
Answer: D
Mathematics
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Estimate the indicated probability.The Amboy Kennel Club has held an annual dog show for the last 12 years. During this time the winner of "Best of Show" has been an Alaskan Malamute 6 times, a Great Pyrenees 3 times, and an Siberian Husky 3 times. Determine the empirical probability that the next winner of "Best of Show" will be an Alaskan Malamute.
A. 
B. 
C. 1
D. 
Mathematics
Express as a difference of logarithms.ln 
A. ln (x - 3)
B. 
C. ln x - ln 3
D. ln 3 - ln x
Mathematics
Use the vertical line test to determine if the graph is a function.
A. Yes B. No
Mathematics
Solve for x.23x + 7 = 
A. x = 
B. x = 3
C. x = 1
D. x = -3
Mathematics