The formula below gives T the approximate time in years it takes a population to double if the annual growth rate is r percent

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2016-05-01 20:22:08

T =70/r, where T is the number of years needed to double the population (or the capital, or any other thing) at the rate r (r , rate of growth) T = 710/4.6 = 15.21 T ≈ 15 years

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