Answer:
At a 4 percent annual growth rate in GDP per capita, it will take 18 years for GDP per capita to double.
Explanation:
Number of years to double = [tex]\frac{70}{annual growth rate}[/tex]
= [tex]\frac{70}{4}[/tex]
≈ 18 years
In this way in total of 18 years the GDP will be double at the constant annual growth rate of 4%.