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10^-3 - 10^-6 = 31 Aug 2019, 09:14
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B
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Difficulty:

35% (medium)

Question Stats:

78% (01:08) correct 22% (01:11) wrong based on 27 sessions

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\(10^{-3} - 10^{-6}\) =

A) 0.0009
B) 0.000999
C) 0.009
D) 0.00999
E) 0.999

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Source: Essential Mathematics web-book by Franco Vivaldi

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B
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10^-3 - 10^-6 = 31 Aug 2019, 09:19
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10^-3*(1-10^-3)
1-10^-3=0.999
So, 0.999×10^-3=0.000999
Option B

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10^-3 - 10^-6 = 31 Aug 2019, 09:41
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energetics
\(10^{-3} - 10^{-6}\) =

A) 0.0009
B) 0.000999
C) 0.009
D) 0.00999
E) 0.999

Show Spoiler
Source: Essential Mathematics web-book by Franco Vivaldi
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\(10^{-3} - 10^{-6}\) = .001 - .000001 = .000999

IMO B
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10^-3 - 10^-6 = 31 Aug 2019, 10:47
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energetics
\(10^{-3} - 10^{-6}\) =

A) 0.0009
B) 0.000999
C) 0.009
D) 0.00999
E) 0.999

Show Spoiler
Source: Essential Mathematics web-book by Franco Vivaldi
Show more
\(10^{-3} - 10^{-6}\)

= \(10^{-3} (1 - 10^{-3})\)

= \(10^{-3} (1 - \frac{1}{1000})\)

= \(10^{-3} (\frac{1000 - 1}{1000})\)

= \(10^{-3} (\frac{999}{1000})\)

= \(\frac{0.999}{1000}\)

= \(0.000999\), Answer must be (B)


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