## An initial species population , Mathematics

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An initial species population is y(0) = 3000. At t=0 the population starts to grow exponentially with a doubling time of 2 years. Mark the only correct statement:

a)    The per capita growth rate is r = 0.4 [years-1]

b)    The population y(5) at the end of 5 years is smaller than 10,000

c)    At t = 6 years some unfortunate event has caused r, the per-capita growth rate to drop to r = -0.5. As a result he populationsize drop below y = 100 around the 11th year.

d)    None of the above.

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