Use the decibel scale to answer the question.How much louder (more intense) is a 57-dB sound than a 40-dB sound?
A. 238 times as loud
B. 50 times as loud
C. 25,118,864 times as loud
D. 1.4 times as loud
Answer: B
Mathematics
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Decide whether the statement is possible or impossible for an angle ?.sec ? = 0.97
A. Impossible B. Possible
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Find an equivalent expression.cos 
A. -tan x B. -sin x C. sin x D. -cos x
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Determine whether the function is periodic. If it is periodic, find the period.f(x) = 4 sin 2x + 2 cos 2x
A. 2?
B. Not periodic
C. ?
D. 
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Find an equation for the ellipse described.Center at (0, 0); focus at (-5, 0); vertex at (8, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics