The manager of the Many Facets jewelry store models total sales by the function S(t) =...

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The manager of the Many Facets jewelry store models total sales by the function S(t) = 2000t 2+0.5t where t is the time (years) since the year 2008 and S is measured in thousands of dollars. (a) At what rate (in dollars per year) were sales changing in the year 2015? (b) What happens to sales in the long run? Choose a statement. The manager of the Many Facets jewelry store models total sales by the function S(t) = 2000t 2+0.5t where t is the time (years) since the year 2008 and S is measured in thousands of dollars. (a) At what rate (in dollars per year) were sales changing in the year 2015? (b) What happens to sales in the long run? Choose a statement.