U.S. Music SalesThe total music sales S from vinyl, CDs, and downloads in billions of dollars x years after 1999 can be modeled by
(a) Evaluate S(14), and interpret your result.
(b) Use the formula for S(x) to write an equation that gives the total music sales y from vinyl, CDs, and downloads in billions of dollars during year x.
(c) Refer to part (b) and find y when x = 2013. Interpret your result.
(d) Use your equation in part (b) to determine the year these sales were $12 billion.
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