A factory is discharging pollution into a lake at the rate of r(t) tons per year given below, where t is the number of years

Question

A factory is discharging pollution into a lake at the rate of r(t) tons per year given below, where t is the number of years that the factory has been in operation. Find the total amount of pollution discharged during the first 9 years of operation. (Round your answer to two decimal places.) 
r(t) = t/ t2 + 1

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