# Answer to Question #49074 in Macroeconomics for Katie

Question #49074

a. According to the Rule of 70, how many years will it take a country to double its output at each of the following annual growth rates?

0.5 percent: ___ years

1 percent: ____ years

1.4 percent: ____ years

2 percent: ____ years

2.8 percent: ___ years

3.5 percent: ____ years

7 percent: ____ years

0.5 percent: ___ years

1 percent: ____ years

1.4 percent: ____ years

2 percent: ____ years

2.8 percent: ___ years

3.5 percent: ____ years

7 percent: ____ years

Expert's answer

According to the Rule of 70, to find how many years will it take a country to double its output at each of the following annual growth rates 70 is divided by the interest percentage per period. So:

0.5 percent: 70/0.5 = 140 years

1 percent: 70/1 = 70 years

1.4 percent: 70/1.4 = 50 years

2 percent: 35 years

2.8 percent: 25 years

3.5 percent: 20 years

7 percent: 10 years.

0.5 percent: 70/0.5 = 140 years

1 percent: 70/1 = 70 years

1.4 percent: 70/1.4 = 50 years

2 percent: 35 years

2.8 percent: 25 years

3.5 percent: 20 years

7 percent: 10 years.

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