I need help,Please!
The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and service produced in the country during a year .During the period 2001-2004,the Gross Domestic Produc of the United Sates grew about 2.8% per year, measure in 2004 dollars .In 2001, the GDP was $9891 billion.
a) Assuming this rate of growth continues, what is the GDP of the United State be in the year 2015?
b) In what year will the GDP reach $20 trillion?

Question

I need help,Please!
The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and service produced in the country during a year .During the period 2001-2004,the Gross Domestic Produc of the United Sates grew about 2.8% per year, measure in 2004 dollars .In 2001, the GDP was $9891 billion. 
a) Assuming this rate of growth continues, what is the GDP of the United State be in the year 2015? 
b) In what year will the GDP reach $20 trillion?