Sales The table shows the sales (in billions of dollars)
Chapter 1, Problem 1.3.20(choose chapter or problem)
Sales The table shows the sales (in billions of dollars) for Wal-Mart stores from 2006 through 2013. (Source: Wal-Mart Stores, Inc.)Year 2006 2007 2008 2009Sales 348.7 378.8 405.6 408.2Year 2010 2011 2012 2013Sales 421.8 447.0 469.2 476.2(a) Set up a system of equations to fit the data for theyears 2006, 2007, 2008, 2009, and 2010 to a quarticmodel.(b) Solve the system. Does the solution produce areasonable model for determining sales after 2010?Explain.
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