and b) Using the model, when will the population be approximately 2.3 million (round to the nearest year)

4.] The population P {In thousands] of Tumbleweed. NV from 2015 to 2018 can be modeled by P = 2430 e-\"m , where t represents the year with t = D corresponding to 2015. a.) What was the population of Tumbleweed in 2013? (Bound to the nearest person}