A company determines that its marginal revenue per day is given by R′(t)​, where R(t) is the total accumulated​ revenue, in​ dollars, on the tth day. The​ company's marginal cost per day is given by C′(t)​, where C(t) is the total accumulated​ cost, in​ dollars, on the tth day.   R′(t)=120et​, R(0)=​0; C′(t)=120−0.1t​, C(0)=0

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