Inventory The stockpile level of liquefied petroleum gases in the United States in 2006
Chapter 8, Problem 55(choose chapter or problem)
Inventory The stockpile level of liquefied petroleum gases in the United States in 2006 can be approximated by the modelQ 109 32 cos t 3 6where Q is measured in millions of barrels and t is the time in months, with corresponding to January. Find the average levels given by this model during (a) the first quarter (b) the second quarter (c) the entire year (Source: Energy Information Administration)
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