Answer:
The growth of the real GDP per capita was 7.18%
Explanation:
It is important to establish that:
Future Value = Present Value × ((1 + r)^t), given that r is the interest rate and t is the time period
Real GDP per worker increased from $40,000 to $320,000 in 30 years
Therefore, we have;
320000 = 40000*(1+r)^30
(1 + r)^30 = 8
1 + r = 8^1/30
1 + r = 1.0718
r = 0.0718 = 7.18%