Total expenditures in a country (in billions of dollars) are increasing at a rate of f(x) = 9.32x + 87.28, where x = 0 corresponds to the year 2000. Total expenditures were $15903 billion in 2002. a. Find a function that gives the total expenditures x years after 2000. b. What will total expenditures be in 2015? E) a. What is the function for the total expenditures? PM = D (Simplify your answer. Use integers or decimals for any numbers in the expression.)