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15. The population, P, of a bacteria colony at t hours can be modelled by: P(t) = 450 + 130t + 15t2 + 2+3 a.

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15. The population, P, of a bacteria colony at t hours can be modelled by: P(t) = 450 + 130t + 15t2 + 2+3 a. What is the initial population of the bacteria colony? [2] b. What is the population of the colony at 5 h? [2] c. What is the growth rate of the colony at 5 h? [3]

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