When bacterial cells multiply maximally during the logarithmic phase, the total number of cells (b) after some time interval (t) is equal to the original number of cells (B) multiplied by 2n, where n is the number of generations formed during the time interval: n = t/g and b = (B)(2n). The generation time (g) for type A cells is 28 minutes (assume no cell death).
Estimate the LEAST amount of time required for a population of type A cells to increase by 300 percent.