In 1940. the population density of a city t miles from the city center was 60 e -0.6 thousand people per square mile. In 1900, the population density of the same city t miles from the city center was 120 e - 0.85 thousand people per square mile. Calculate the number of people who lived within 4 miles of the city center in 1940. Sketch the graphs of the population densities for 1940 and 1900 on a common graph. What trend do the graphs exhibit? How many thousands of people lived within 4 miles of the city center in 1940? Inc thousand people. (Round to the nearest thousand as needed.)