Question 19, 2.4.15-BE HW Score: 64.39%, 14.17 of 22 Part 1 of 4 points Points: 0 of 1 Save In 2011 a country's federal receipts (money taken in) totaled $2.15 trillion. In 2013, total federal receipts were $2.85 trillion. Assume that the growth of federal receipts, F, can be modeled by an exponential function and use 2011 as the base year (t = 0). a) Find the growth rate k to six decimal places, and write the exponential function F(t), for total receipts in trillions of dollars. b) Estimate total federal receipts in 2015. c) When will total federal receipts be $15 trillion