Answer:
The answer is: 7% annual growth rate
Step-by-step explanation:
The Rule of 70 is a way to determine how many years it will take an economy to double its GDP (or GDP per capita) with a given annual growth rate.
The formula used by the Rule of 70 is:
number of years = 70
to double an economy annual percentage growth rate
In this exercise we substitute the known variables and calculate:
10 years = 70 / (annual growth rate)
annual growth rate = 70 / 10 = 7%