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A certain population of bacteria is known to grow at a rate proportional to the amount present in a culture that provides plentiful food and

A certain population of bacteria is known to grow at a rate proportional to the amount present in a culture that provides plentiful food and space. Initially there are 450 bacteria, and after seven hours, 900 bacteria are observed in the culture. Determine the approximate number of bacteria that will be present in the culture after 20 hours.

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