APES Math frq review
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5 Terms
1
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Calculating percent change
(new number - old number) / (old number) x 100
2
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Unit Conversions
Keep units on opposite sides of the division line in dimensional analysis to eliminate starting unit and convert to units needed for answer
3
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Net Primary Productivity
GPP - RL
GPP: Gross primary productivity
RL: Reporting limit
4
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Percent Growth Rate of a Country
(CBR - CDR) / 10
CBR: Crude birth rate
CBR: Crude death rate
5
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Rule of 70
70 / (r ) growth rate % = Doubling time in years
Note 
Flashcards (73)