[Blindmath] population growth equations

[Wilson_KC]

I think all levels of math questions should be asked freely and answered freely.  I too have encountered "snarky" answers from this site and it's offensive.  

________________________________________
From: Blindmath [blindmath-bounces at nfbnet.org] on behalf of Kathy via Blindmath [blindmath at nfbnet.org]
Sent: Tuesday, March 24, 2015 12:31 PM
To: Alastair Irving; Blind Math list for those interested in mathematics
Subject: Re: [Blindmath] population growth equations

first, Thanks for the information.

     Second, As to this list not being used to help with math problems, I am
sorry if I did something wrong. I didn't know that asking for some friendly
assistance would be viewed as such a breech of protocol.

I really don't appreciate getting my feelings hurt just because I reached
out on this list, and if that is the response I get, being part of this list
is not worth that. I will now be unsubscribing from the blind math list.

Kathy
-----Original Message-----
From: Alastair Irving via Blindmath
Sent: Tuesday, March 24, 2015 3:04 PM
To: blindmath at nfbnet.org
Subject: Re: [Blindmath] population growth equations

Hi

I don't think this list should be used for questions of this sort,
unless there's an accessibility issue causing the problem.  Having said
that, since I don't want to send a purely negative response, here's how
you would solve your problem:

Step 1: find the rate of growth per year by solving
x^10=2
to get x approximately 1.07 (this means the population grows by about 7
per cent each year).

Step 2: In 12 years the population will increase by a factor x^12 (which
is about 2.3), so you multiply the original population by this.

HTH



Alastair





On 24/03/2015 15:54, Kathy via Blindmath wrote:
> Can anyone help me figure out how to perform the calculations for this
> type of problem?
>
> If a population has a doubling time of 10 years, how do I figure out the
> population for a different time period, for example, at 12 years? Can
> anyone explain how to perform this type of equation?
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