Sean and Carley Have Bacterial Infections

question 219

Essay

Sean and Carley have bacterial infections.Sean was given medicine which reduces the number of bacteria hourly by 20%.5 hours later Carley began the same treatment.
(a)If y = 0.
represents the multiplicative decrease of bacteria for Carley,write an equation using the same reference that represents the multiplicative decrease in the bacteria in Sean.
(b)If a doctor had a graph of the multiplicative decrease of bacteria for Carley,how could she use it to graph the multiplicative decrease of the bacteria in Sean? Verify your answer using a graphics calculator.

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