In a liquid culture, the number of bacteria grows at a proportional rate depending on the number of cells present. At the start, there are 5000 cells present in the culture. After 2 hours, there are 25 000 bacteria. If this unlimited growth is constant each time, what is the doubling time of the bacteria? O a. 0.861 hr O b. 0.582 hr Oc. 1.045 hr O d. 0.917 hr

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