A bacteria culture starts with 320 bacteria and grows at an exponential rate. After 4 hours there will be 1280 bacteria. Give your answer accurate to at least 4 decimal places. (a) Express the population P after t hours as a function of t. P(t)= (b) What will be the population after 8 hours? bacteria (c) How long will it take for the population to reach 1970? hours

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