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The total accumulated costs C(t) and revenues R(t) in thousands of dollars, respectively; for a coal mine satisfy:C'(t)=_t7andR' (t) = St? e-t"where ...

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The total accumulated costs C(t) and revenues R(t) in thousands of dollars, respectively; for a coal mine satisfy:C'(t)=_t7andR' (t) = St? e-t"where is the number of years that the mine has been in operation:Find the useful life of the mine; to the nearest year:What is the total profit accumulated during the useful life of the mine? Round answer to the nearest dollar:

The total accumulated costs C(t) and revenues R(t) in thousands of dollars, respectively; for a coal mine satisfy: C'(t)=_t7 and R' (t) = St? e-t" where is the number of years that the mine has been in operation: Find the useful life of the mine; to the nearest year: What is the total profit accumulated during the useful life of the mine? Round answer to the nearest dollar:

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