Topic III-15 Exponential Equations 5. Binary fission is a process in which one bacterial cell divides into two. The bacterium Escherichia coli is one of the fastest growing bacteria. It can reproduce itself every 15 minutes. a. Write an exponential function to represent the number of cells c after time t minutes. b. If you begin with one E. coli cell, how many cells will there be in one hour? HS-40

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