Question

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008?

Please help I got 670,422 and the computer marked it wrong i then tried rounding it to 671000 but it was still wrong! Please help me THank you

Answer 1

Both Scott and I did this for you here , and we both got the same answer

http://www.jiskha.com/display.cgi?id=1489120237

Answer 2

(900,000 - 800,000)/2 = 50,000/yr.

P = 800,000 - (50.000/yr. * 3yrs) =
800,000 - 150,000 = 650,000.

Answer 3

It said exponentially. You made it a linear decay.

Answer 4

Yes,thanks!