The revenue of a multimillion corporation (in million pesos from 2000 to 2010 is modeled by function, f(t) = 3.012t* – 51.003t3 + 523.345t? - 10008.21t – 324.65 where t is the year, with t = 1 corresponding to 2000. At what rate was the company's revenue changing in 2008?

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