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6. [2 marks] The population P of bacteria in a culture grows at a rate proportional to the amount of bacteria present at time 15.

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6. [2 marks] The population P of bacteria in a culture grows at a rate proportional to the amount of bacteria present at time 15. At t = 1 it is observed that P = 400 bacteria are present. A second counting at t = 3 yields P = 1600 bacteria. How many bacteria were there at time t = 0? (A) 200 (B) 300 (C) 100 (D) 4001112 (E) none of (A)(D)

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