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Population Density

population/area

Birth or Death Rates (%)

# of births or deaths per year/total population

Population Growth Rate (r) (%)

births-deaths/total population

Doubling Time of a Population (years)

.7/growth rate

Annual Growth Rate for the World (already in %)

CBR-CDR/10

Annual Growth Rate for a Nation (already in %)

(CBR+Immigration)-(CDR+Emmigration)/10

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