Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 45.05 sin x superimposed over a scatter diagram of the data. Find the sinusoidal function of the form 
which best fits the data.
A. y = 45.05 sin 
+ 66.25
B. y = 45.05 sin 
+ 66.25
C. y = 45.05 sin 
+ 21.20
D. y = 45.05 sin 
+ 21.20
Answer: A
Mathematics
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Translate the phrase to an algebraic expression. Use x to represent "a number."Multiply a number by -10.
A. x ? (-10) or -10x
B. (-10) ÷ x or 
C. -10 + x
D. x ÷ (-10) or 
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Find the volume.Find the volume of the solid generated by revolving the region under the curve 
in the first quadrant about the y-axis.
A. 8? B. 8?3 C. 4? D. 64?
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Write decimal notation.- 
A. -0.56 B. -560 C. -0.056 D. -5.6
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Write an equivalent expression in logarithmic form.42 = 16
A. log164 = 2 B. log416 = 2 C. log216 = 4 D. log42 = 16
Mathematics