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 
+ 21.20
B. y = 45.05 sin 
+ 66.25
C. y = 45.05 sin 
+ 66.25
D. y = 45.05 sin 
+ 21.20
Answer: B
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Provide an appropriate response.Write an "area" word problem for which finding the solution would involve evaluating the double integral
What will be an ideal response?
Solve the problem.After introducing an inhibitor into a culture of luminescent bacteria, a scientist monitors the luminosity produced by the culture. Use a graphing utility to fit a logarithmic function to the data. Predict the luminosity after 20 hours.
A. y = 98.75 - 32.66 ln (x), 0.91 B. y = 100.5 - 32.7 ln (x), 2.54 C. y = 112.97 - 45.97 ln (x), -24.74 D. y = 107.55 - 41 ln (x), -15.27
Solve the equation.12n2 + 90n = 0
A. 
B. 
C. 
D. {0}
Graph the ellipse.4x2 + 25y2 = 100
A. 
B. 
C. 
D. 