Posted by **Leanna** on Sunday, August 29, 2010 at 11:37pm.

In 1951, the population of India was 357 million people. By 1981 it had grown to 984 million. If the population is growing exponentially, when (in what month of what year) will the population reach 1 billion people?

How do you know what month?

-Reiny

- Math -
**Reiny**, Sunday, August 29, 2010 at 11:42pm
I think you are talking about this post

http://www.jiskha.com/display.cgi?id=1283104183

the answer was 30.477 years

which means 30 years + .477 of the next year

so I multiplied .477x12 (12 months)

to get 5.7 months

So for 5 months the 1 Billion has not been reached and we need the 6th month.

jan = 1

feb = 2

..

may = 5

june = 6

- Math -
**Leanna**, Sunday, August 29, 2010 at 11:44pm
I just reposted this again a couple seconds ago. Didn't see you helped me with this. Thanks for you help...

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