algebra

The population of a city in 2005 was 18,000. By 2010, the city’s population had grown to 45,000. Economists have determined that the population growth follows an exponential model. If they are correct, what is the projected population for 2015?

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  1. 45/18 = 5/2
    it grew by that factor in 5 years.
    So, in the next 5 years it will grow by another factor of 5/2 to 45,000 * 5/2

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    oobleck
  2. it was 112500 I think
    oh well

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  3. why "oh well"?
    45,000 * 5/2 = 112500

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    oobleck

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