30. Water is being pumped into a tank at the rate of 950 liters/hour. Water is removed from the tank at a rate modeled by R(t) liters per hour, where R is differentiable and decreasing on 0≤t≤8. Selected values of R(t) are shown in the table below. Is there a time t when the rate at which the water is pumped into the tank is the same as the rate at which the water is removed from the tank? Justify. 0 1 3 6 t (hours) R(t) (liters/hour) 1340 8 1190 900 740 700

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