Population Math Formulas

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Doubling Time

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13 Terms

1

Doubling Time

70 / % growth rate ( r ) = years to double

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2

Population Density

total population / total area

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3

Birth Rate (as a %)

total births / total population x 100

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4

Death Rate (as a %)

total deaths / total population x 100

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5

Crude Birth Rate (CBR)

total # births / total population x 1000

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6

Crude Death Rate (CDR)

total # deaths / total population x 1000

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7

Population Growth Rate*

births - deaths x 100 / total population*

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8

Population Growth Rate_

CBR - CDR / 10 = r %_

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9

Percent Change

[(new - old)] / old x 100

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10

Population Growth Rate@

(births + immigration) - (deaths + emigration) x 100 / total population@

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11

Population Growth Rate for a Region/Country

(CBR + I) - (CDR - E) / 10

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12

I

immigration

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13

E

emigration

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