
Concept explainers
A researcher is trying to determine the doubling time for a population of the bacterium Giardia lamblia. He starts a culture in a nutrient solution and estimates the bacteria count every four hours. His data are shown in the table.
Time (hours) | 0 | 4 | 8 | 12 | 16 | 20 | 24 |
Bacteria count (CFU/mL | 37 | 47 | 63 | 78 | 105 | 130 | 173 |
(a) Make a
(b) Use a graphing calculator to find an exponential curve
(c) Graph the model from part (b) together with the scatter plot in part (a) Use the TRACE feature to determine how long it takes for the bacteria count to double.

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Chapter 6 Solutions
Calculus (MindTap Course List)
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