Use the figure below to answer the following question.
Between what two decibel readings is the least change in power output found? (Hint: assume that db readings were taken at the following points: 18, 20, 22, 24, 26, 28, 30, 32)
A. 24 db and 26 db
B. 20 db and 22 db
C. 22 db and 24 db
D. 30 db and 32 db
E. 20 db and 26 db
Answer: D
Mathematics
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Describe the next row operation that should be performed to make the matrix closer to row echelon form.
A. Replace R2 with - 
R2.
B. Replace R2 with 15R1 + R2.
C. Replace R2 with -15R1 + R2.
D. Replace R2 with - 
R2.
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Find the quotient and write the answer in simplest form. Assume variables represent nonnegative values.
A. 12z4
B. 12z8
C. 12z4
D. 4z4
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Find the value for the function.Find f(x + 1) when f(x) = 
.
A. 
B. 
C. 
D. 
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Simplify the complex fraction.
?
A. 
B. 
C. 
D. 
E. 
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