Posted by Anonymous on Thursday, October 21, 2010 at 11:13am.
India's population has been catching up with China, with 1132 million in mid2007 and growing at 1.6% per year, versus China then with 1318 million and growing at only 06%. If these rates continue, when will India have more people than China?

calculus  Reiny, Thursday, October 21, 2010 at 11:24am
solve for t
1132 e^(.016t) = 1318 e^(.06t)
That will give you the time when they are equal.
You will have to use logs. (use ln)

Typo  calculus  Reiny, Thursday, October 21, 2010 at 11:34am
Just noticed you have a typo, and I read it as .06
does it say 0.6 % ?
if so change my equation to
1132 e^(.016t) = 1318 e^(.006t)
You should get a t value of 15.2, add that to the year 2007 and draw your conclusion from that.
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