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Question Test OG, maybe easy but...still

This topic has 1 expert reply and 4 member replies
isisalaska Community Manager Default Avatar
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Question Test OG, maybe easy but...still

Post Sun Jan 07, 2007 4:33 pm
5^11 x 4^11= 2x10^n what is "n"?
Please show me "all the steps" thank you

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Stacey Koprince GMAT Instructor
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Post Fri Jan 26, 2007 11:49 pm
Hi, Isis - please be sure to use parentheses to make your problem clear. Thanks!

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kandelaki Senior | Next Rank: 100 Posts Default Avatar
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Post Tue Feb 27, 2007 11:38 pm
i wonder can you do this 5^11*4^11=20^11 ??

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GMAT/MBA Expert

Stacey Koprince GMAT Instructor
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Post Fri Jan 26, 2007 11:49 pm
Hi, Isis - please be sure to use parentheses to make your problem clear. Thanks!

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kandelaki Senior | Next Rank: 100 Posts Default Avatar
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Post Tue Feb 27, 2007 11:38 pm
i wonder can you do this 5^11*4^11=20^11 ??

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axefx Newbie | Next Rank: 10 Posts Default Avatar
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Post Thu Jan 25, 2007 12:10 pm
isisalaska wrote:
10 X (multiplied)
If the question is:
(5^11) * (4 ^ 11) = (2 * 10)^n
Then the answer is n=11...

(5^11) * (4 ^ 11) = (2 * 10)^n
= (5 * 4) ^ 11 = (2 * 10)^n
= (20)^11 = (20)^n
i.e. n = 11

If the question is:
(5^11) * (4 ^ 11) = 2 * (10^n)
Then I don't know how to solve this question and will appreciate the answer

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