Formulas Flashcards
(10 cards)
1
Q
Average
A
(x+y+x)/n
n= the number of values given
2
Q
Percent of total
A
(sebset value/total value) x 100
3
Q
Percent change
A
New-Old / Old x 100
4
Q
Annual rate of change
A
(final value - initial value) / final year - initial year
5
Q
Net Primary Productivity
A
GPP - Respiration = NPP
6
Q
Global/ national population growth rates
A
population growth rate (%) = (CBR - CDR) / 10
7
Q
Global/ national population growth rates WITH MIGRATION
A
Population growth rate (%) = (CBR-CDR +/- CNMR) / 10
CNMR = crude net migration rate
8
Q
Doubling time (years)
A
70/ growth rate
9
Q
Population Density
A
70 / growth rate (%)
10
Q
Per captia
A
total measurement / population size
