City A has an initial population of 2.1 thousand. The population grows by 5% each year. City B has an initial population of 6.7 thousand. The population declines by 7% per year.
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A: Find a formula that gives the population A, in thousands, of city A after t years.
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B: Find a formula that gives the population B, in thousands, of city B after t years.
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C: Make a graph that shows both populations over the first 20 years.
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D: When will the populations of the two cities be the same? Round your answer to two decimal places if necessary. What is that common population? Round the number of thousand to two decimal places if necessary.
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What will be an ideal response?
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B: 
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C:
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D: The populations are the same after 9.56 years. The common population is 3.35 thousand.
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