Question 2 Express the limit of Riemann sums as a definite integral lim\fhe population of Mathville is growing at a rate of r(t ) people per year, where t represents the number of years after 2015. (So, t = 0 corresponds o the year 2015, t = 1 corresponds to the year 2016, etc.) In 2015, Mathville's population was 23,500 people. Use complete sentences and ppropriate units to answer the following questions. (a) What does the quantity / r(t) dt represent? 5 (b) What does the quantity |23,500 +/ r(t) at represent