Gary is testing a river water sample in his lab. Initially, there are 64 bacteria in the river water sample. The number of bacteria after 3 hours can be calculated using the expression shown below. Use the given expression to complete the statements. The quantity that represents the initial number of bacteria is . The quantity that represents the rate at which the number of bacteria is increasing is , which means the growth rate percentage for the bacteria is %.
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The expression missing from this question is :
64(1.12)³
We can now answer the questions :
1) The quantity that represents the initial number of bacteria.
The answer is 64
2) The quantity that represents the rate at which the number of bacteria is increasing is :
The answer is 0.12
3)The growth rate percentage is :
The answer is 0.12 × 100 = 12%
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