Suppose that the GDP of California increases by 8.0% each year. How long will it take for the GDP of California to double? Round your answer to one digit after the decimal. duration for California's GDP to double: Suppose that the GDP of Oregon today is exactly twice what it was 17 years ago. What was the average annual growth for Oregon over this time period? Round your answer to one digit after the decimal. average annual growth for Oregon: \% each year