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There are two species of microbes,A and B,which can be grown together or separately.If G A is the per capita growth rate of species A,G B is the per capita growth rate of species B,D A is the density of species A,and D B is the density of species B,the per capita growth rates for each are the following:
G A = 0.18 - 0.019 D A + 0.008 D B
G B = 0.22 - 0.012 D B + 0.005 D A
-If the density of A is 10 and the density of B is 20,the growth rate(s)of

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Use the following to answer questions :
There are two species of microbes,A and B,which can be grown together or separately.If G A is the per capita growth rate of species A,G B is the per capita growth rate of species B,D A is the density of species A,and D B is the density of species B,the per capita growth rates for each are the following:
G A = 0.18 - 0.019 D A + 0.008 D B 
G B = 0.22 - 0.012 D B + 0.005 D A 
-If the density of A is 10 and the density of B is 20,the growth rate(s)of

Quizplus · Accepted Answer

Plug in the values given: G_A = 0.18 - 0.019 (10) + 0.008 (20) = 0.18 - 0.19 + 0.16 = 0.15 G_B = 0.22 - 0.012 (20) + 0.005 (10) = 0.22 - 0.24 + 0.05 = 0.03 Since the growth rate of A is positive (0.15) and the growth rate of B is also positive (0.03), the answer is A.

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