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(0.0036)(2.8) / (0.04)(0.1)(0.003) =

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Manager
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Joined: 02 Dec 2012
Posts: 178
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Kudos [?]: 257 [0], given: 0

(0.0036)(2.8) / (0.04)(0.1)(0.003) = [#permalink] New post 07 Dec 2012, 02:52
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

65% (02:14) correct 35% (01:18) wrong based on 392 sessions
(0.0036)(2.8) / (0.04)(0.1)(0.003) =

(A) 840.0
(B) 84.0
(C) 8.4
(D) 0.84
(E) 0.084
[Reveal] Spoiler: OA
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Re: (0.0036)(2.8) / (0.04)(0.1)(0.003) = [#permalink] New post 07 Dec 2012, 02:58
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Walkabout wrote:
(0.0036)(2.8) / (0.04)(0.1)(0.003) =

(A) 840.0
(B) 84.0
(C) 8.4
(D) 0.84
(E) 0.084


\frac{0.0036*2.8}{0.04*0.1*0.003}=\frac{(36*10^{-4})*(28*10^{-1})}{(4*10^{-2})(1*10^{-1})*(3*10^{-3})}=\frac{36*28*10^{(-4-1)}}{4*3*10^{(-2-1-3)}}=84*10=840.

Answer: A.
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Director
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Concentration: General Management, Technology
WE: Information Technology (Computer Software)
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Kudos [?]: 194 [0], given: 164

Re: (0.0036)(2.8) / (0.04)(0.1)(0.003) = [#permalink] New post 13 Jun 2013, 01:40
While reading the problem, I re-wrote in the following way:
36/100000 * 28/10 * 100 / 4 * 10/1 * 1000/3
Simplifying further, Answer = A = 840
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Joined: 04 Aug 2013
Posts: 6
Concentration: Sustainability, Entrepreneurship
WE: Architecture (Energy and Utilities)
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GMAT ToolKit User
Re: (0.0036)(2.8) / (0.04)(0.1)(0.003) = [#permalink] New post 29 Oct 2013, 15:13
I calculated the power of 10.
It was 10^5 / 10^-6.
Hence the ans. will end with 10^1. Its only A.
Re: (0.0036)(2.8) / (0.04)(0.1)(0.003) =   [#permalink] 29 Oct 2013, 15:13
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