Pharmaceutical theft has been rising rapidly in recent years. Experts believe that pharmaceuticals are the new "street gold." The value of stolen drugs (in millions of dollars per year) from 2007 through 2009 is approximated by the function f(t) = 20.5e0.74t      (1 ≤ t ≤ 3)  where t is the number of years since 2007†. Find the rate of change of the value of stolen drugs at t = 3. (Round your answer to two decimal places.) $______ million per year

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