Solve the problem.Use the following graph, which shows the sales of digital music players, in millions, at a national electronics retail store for the years 2005-2012. Use the graph to represent the set in roster form.
20052006200720082009201020112012YearThe set of years included in the graph in which digital music player sales were more than 18 million.
A. {2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012}
B. {0}
C. { }
D. {2005, 2006, 2007, 2008, 2009, 2010, 2011}
Answer: C
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Solve the problem.A share of XYZ stock sold for $37
yesterday and for $14
today. If Martin owns 130 shares, how much less are the shares worth today than yesterday?
A. $693
B. $3011
C. $832
D. $3614
Use the REGRESSION feature on a graphing calculator.As the number of farms has decreased in South Carolina, the average size of the remaining farms has grown larger, as shown below. 
Let x represent the number of years since 1900. Use a graphing calculator to fit a quadratic function to the data. Round your answer to five decimal places.
A. y = 0.02536x3 + 1.21114 + 102.58741 B. y = 0.02536x2 + 1.21114 x + 102.58741 C. y = -.00114x3 + 0.19605x2 - 5.29775 + 143.55245 D. y = 0.02536x3 + 1.21114 x + 102.58741
Solve the problem.Suppose f(x) = 34.1 + 1.3log (x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the depth (to the nearest tenth of a meter) where the salinity equals 36.
A. -0.9 m B. -1.0 m C. 29.9 m D. 27.9 m
Solve the problem.Peter must practice the piano 14
hours per week. He has already practiced 7
hours. How many more hours does he need to practice?
A. 5
hours
B. 6 hours
C. 6
hours
D. 7
hours