Concept explainers
Sales The sales S (in billions of dollars) for Lockheed Martin for the years 2004 through 2013 can be modeled by
(a) Find the years, from 2004 through 2013, when the maximum and minimum sales occurred.
(b) During which year were the company’s sales increasing most rapidly?
(c) During which year were the company’s sales decreasing most rapidly?
(d) Use a graphing utility to graph the sales function and verify the results in parts (a), (b), and (c).
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