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2 July, 11:02

The population of a certain city was 25000 in 2010 and decreased by 4% each year afterword. The population can be modeled by an exponential function of the form y = ab^x where x represents the number of years since 2010. What are the values of a and b?

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  1. 2 July, 11:23
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    a = initial value, 25000. b = rate of decay, (1-.04) or (.96)

    a represents the initial value in exponential functions and b represents the rate of growth or decay. for decay subtract the 4% from 1 or 1-.04.
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