The population of an aquatic species in a certain body of water is approximated by the logistic function G(t) = - 25,000 30,000- Ay 1 + 10e- 0.66t' where t is measured in years. 20,000- Calculate the growth rate after 6 years. 10,000- t 8 12 16 20 . . . The growth rate in 6 years is (Do not round until the final answer. Then round to the nearest whole number as needed.)