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On a particular day, the power used in a particular state (in thousands of megawatts) could be approximated by the function P(t) = - 0.006794t3

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On a particular day, the power used in a particular state (in thousands of megawatts) could be approximated by the function P(t) = - 0.006794t3 + 0'1917t2 - 0.6626t+ 2095, where t is the number of hours since midnight, for 0 its 24. Find any relative extreme for power usage, as well as when they occurred. Find the derivative of P0) P'(t)=

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