The population in a certain city was 55,000 in 2000, and its future size is predicted to be P(t) = 55,000e0.013t, where t is the number of years after 2000. Complete parts a through d below. a. Does this model indicate that the population is increasing or decreasing? O decreasing increasing b. Use this function to estimate the population of the city in 2007. (Round to the nearest whole number as needed.)