Posted by **Anonymous** on Tuesday, March 26, 2013 at 9:24pm.

the population of a city can be modeled using the equation p=40,000x(9/10)^x. one year the population was 23620. what was the following population a year later.

- algebra 1 -
**Reiny**, Tuesday, March 26, 2013 at 9:38pm
So let's solve

40,000x(9/10)^x = 23620

I will assume that the x after 40,000 is supposed to be a multiplication sign and not a variable,

If it is a variable you have an completely ridiculously hard equation to solve,

If we take it as

40,000(9/10)^x = 23620

then x = 5 is a solution, (too nice not be be that way)

so we want the population when x = 6

P = 40000((9/10)^6

= 21258

- algebra 1 -
**Anonymous**, Tuesday, March 26, 2013 at 9:41pm
o i get it thank you

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