Question: When a bactericide is added to a nutrient broth in which bacteria are growing, the bacterium population continues to grow for a while, but then

When a bactericide is added to a nutrient broth in which bacteria are growing, the bacterium population continues to grow for a while, but then stops growing and begins to decline. The size of the population at time t (hours) is b = 125 + 12"t- 12"t. Find the growth rates at t =0 hours, t= 6 hours, and t= 12 hours

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