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Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notat

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Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notat [#permalink]

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New post 26 Apr 2017, 10:38
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Difficulty:

  15% (low)

Question Stats:

81% (01:16) correct 19% (00:45) wrong based on 37 sessions

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Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notation?

A. 1.2 × 10^12
B. 8.1 × 10^12
C. 8.1 × 10^13
D. 1.5 × 10^22
E. 1.2 × 10^24
[Reveal] Spoiler: OA

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Re: Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notat [#permalink]

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New post 26 Apr 2017, 10:49
3^4 *25^6*2^12
3^4 *5^12*2^12
3^4 *10^12
81*10^12
8.1*10^13

Option C



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Re: Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notat [#permalink]

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New post 26 Apr 2017, 14:42
3^4x25^6x2^12
=3^4x(5^2)^6x2^12
=3^4x5^12x2^12
=3^4x(5x2)^12
=81x10^12
=8.1^10^13
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Re: Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notat   [#permalink] 26 Apr 2017, 14:42
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Which of the following expresses 3^4 × 25^6 × 2^12 in scientific notat

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