A factory discharges pollutants into a large river at a rate that is estimated by a water quality control agency to be P(t)=t1+t2for 0 < t < 5, where P(t) is the total number of tons of pollutants discharged into the river after t years of operation. What quantity of pollutants will be discharged into the river from the end of the third year to the end of the fifth year? (Round to two decimal places.