Not a GMAT question but a quant question nonetheless!! : PS Archive
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# Not a GMAT question but a quant question nonetheless!!

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Current Student
Joined: 03 Dec 2007
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Schools: NYU STERN
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Not a GMAT question but a quant question nonetheless!! [#permalink]

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11 Jul 2009, 17:02
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I need help solving for T!!! Any takers?

(1.0125)^4T= 2
Manager
Joined: 05 Jul 2008
Posts: 139
GMAT 1: Q V
GMAT 2: 740 Q51 V38
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Kudos [?]: 104 [0], given: 40

Re: Not a GMAT question but a quant question nonetheless!! [#permalink]

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12 Jul 2009, 00:07
hardaway7 wrote:
I need help solving for T!!! Any takers?

(1.0125)^4T= 2

I'll try.
4T= log(1.0125) 2
T= [log(1.0125) 2 ] /4
8D
Intern
Joined: 11 Jul 2009
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Location: Delhi
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Re: Not a GMAT question but a quant question nonetheless!! [#permalink]

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12 Jul 2009, 08:52
1
KUDOS
Hi,

4t log 1.0125 = log 2
4t log 10125 / 10000 = log 2
4t log (3^4 * 5 ^3 / 10000 ) = log 2
4t (4 log3 + 3 log 5 - 4) = log 2
4t (4 * .4771 + 3 ( 1 - .3010) - 4) = .3010
4t( 1.9084 + 2.097 - 4) = .3010
4t(.0054) = .3010
4t = 55.74
t = 13.93 ..
Current Student
Joined: 03 Dec 2007
Posts: 83
Schools: NYU STERN
Followers: 3

Kudos [?]: 6 [0], given: 0

Re: Not a GMAT question but a quant question nonetheless!! [#permalink]

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12 Jul 2009, 09:30
Thanks! How do you know to do Log??? Sorry - it's been a LONG time!
Re: Not a GMAT question but a quant question nonetheless!!   [#permalink] 12 Jul 2009, 09:30
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