Studies to fit a logistic model to a particular species of the fish

population have yielded 3.21 146 1 2.8 t N e− = + , where t is measured in years and N is measured in thousands of tons of fish. At what time was the population growing the most rapidly? Round your answer to two decimal places. a) t = 0.54 year b) t = 0.02 year c) t = 0.32 years d) t = 0.16 year