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PS: GMATPrep 1 (growth rates)

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Director
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PS: GMATPrep 1 (growth rates) [#permalink]

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Can someone explain the attached? It seems easy, but I get the wrong answer. I set the formula as:

4 * (1+x)^6 = 6/5 * (4*(1+x)^4)

I don't know how to solve for X in that formula in the first place, but even if I did I'm sure it's not right.

:(

Thanks.
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Re: PS: GMATPrep 1 (growth rates) [#permalink]

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multiply through by 5

Image

Image

Image

The constant amount is X feet per year, no need to raise it to powers or anything like that. Keep it simple
Director
Director
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Joined: 14 Sep 2007
Posts: 908
Schools: Kellogg '10
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Kudos [?]: 89 [0], given: 15

Re: PS: GMATPrep 1 (growth rates) [#permalink]

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New post 13 Feb 2008, 12:35
eschn3am wrote:
The constant amount is X feet per year, no need to raise it to powers or anything like that. Keep it simple


Argggh... :beat

Man I dumb sometimes.

Thanks!
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Re: PS: GMATPrep 1 (growth rates)   [#permalink] 13 Feb 2008, 12:35
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