Question: The total U.S. personal income I (in billions of dollars) from 1988 and projected to 2018 can be modeled by
I = 70,290/1 + 18.26e-0.058t
where t is the number of years past 1985 (Source: U.S. Department of Labor).
(a) What does the model predict for the total U.S. personal income in 2015?
(b) When will the total U.S. personal income reach $25,000 billion?