In a population of 1000 individuals, 500 new individuals were born and 200 individuals died over the course of one year. Which equation shows how to calculate the population growth rate of this population?
a. 0.50 + 0.20 = 0.70
b. 0.20 - 0.50 = - 0.30
c. 0.50 - 0.20 = 0.30
d. 0.20 x 0.50 = 1.00
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