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30. The population of a bacterial culture was 5000 bacteria after 15 min and 40 000 bacteria after 1 h. a) After how many minutes

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30. The population of a bacterial culture was 5000 bacteria after 15 min and 40 000 bacteria after 1 h. a) After how many minutes will the population reach 150 000 bacteria? (3 marks) b) Find the rate of growth after 15 min. Express your answer as bacteria per hour

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