Find the opposite (additive inverse) of the number.-23
A. 23
B. - 
C. -23
D. 0
Answer: A
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Solve the problem.Use the formula L = 10 ? log 
, where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the soundwave, and 
A certain noise produces 6.35 × 10-4 W/m2 of power. What is the decibel level of this noise?
A. 203 dB B. 78 dB C. 88 dB D. 9 dB
Solve the problem.The population of a town was 32,700 at the beginning of 1970. If the population decreased by 400 people per year, how many people lived in the town at the beginning of 1985?
A. 26,700 B. 26,300 C. 6000 D. 27,100
Solve the problem.The polynomial 
gives the approximate total earnings of a company, in millions of dollars, where x represents the number of years since 1996. This model is valid for the years from 1996 to 2000. Determine the earnings for 1999. Round your answer to two decimals, if necessary.
A. $2.48 million B. $2.11 million C. $2.19 million D. $1.96 million
Find the exact value of y, or state that y is undefined.y = sin-1 
A. - 
B. 
C. 
D. 