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# The quantity (6.4*10^7)^(1/2). equals which of the following?

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Math Expert
Joined: 02 Sep 2009
Posts: 58415
The quantity (6.4*10^7)^(1/2). equals which of the following?  [#permalink]

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01 Apr 2018, 11:15
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Difficulty:

5% (low)

Question Stats:

92% (00:34) correct 8% (01:17) wrong based on 49 sessions

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The quantity $$\sqrt{6.4*10^7}$$. equals which of the following?

(A) 800
(B) 3,200
(C) 4,000
(D) 8,000
(E) 80,000

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Joined: 31 Oct 2013
Posts: 1467
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
The quantity (6.4*10^7)^(1/2). equals which of the following?  [#permalink]

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01 Apr 2018, 12:36
Bunuel wrote:
The quantity $$\sqrt{6.4*10^7}$$. equals which of the following?

(A) 800
(B) 3,200
(C) 4,000
(D) 8,000
(E) 80,000

$$\sqrt{6.4*10*10^6}$$
$$\sqrt{64*(10^3)^2}$$
=8*10^3
=8000
so. the correct answer will be option D.
Intern
Joined: 01 Apr 2018
Posts: 8
Re: The quantity (6.4*10^7)^(1/2). equals which of the following?  [#permalink]

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01 Apr 2018, 12:46
=(64*10^6)^(1/2)=8*10^3=8000

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Re: The quantity (6.4*10^7)^(1/2). equals which of the following?   [#permalink] 01 Apr 2018, 12:46
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