For a certain region in the world, the age distribution of the population is approximately modeled (in millions] by the function z} = 40.2 + 3.2:: 0.39732 where z varies from U to 9 decades. [3.) Evaluate the integral over the interval [0, 9]. Round to the nearest integer as needed. :1 [b] What does the value of this integral represent? 0 The total number of people (in millions) under the age of 9 who currently live in the region 0 The total number of people [in millions) aged 0 to 90 who currently live in the region 0 The number of people [in millions} aged 0 to 90 who have ever lived in this region 0 The increase in the number of people (in millions] aged 0 to 90 who currently live in the region