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gahm8684

  • one year ago

This is the excercise: (363 × 1.48)/3.5-1.79 + 6.1 × 10^−1 However, my question is unralated the answer. Does 10^-1 out as a significant figure? and if it does, it would count as 1 digit, right?

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  1. jdoe0001
    • one year ago
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    hmmm what's the question again?

  2. Hero
    • one year ago
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    Write 10^{-1} as a decimal, then it should be obvious to you.

  3. gahm8684
    • one year ago
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    \[(\frac{ (363*1.48) }{ 3.5-1.79 })+6.1*10^{-1}\]

  4. gahm8684
    • one year ago
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    0.1

  5. jdoe0001
    • one year ago
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    \(\bf a^{-{\color{red} n}} \implies \cfrac{1}{a^{\color{red} n}}\qquad \qquad \cfrac{1}{a^{\color{red} n}}\implies a^{-{\color{red} n}} \\ \quad \\ % negative exponential denominator a^{{\color{red} n}} \implies \cfrac{1}{a^{-\color{red} n}} \qquad \qquad \cfrac{1}{a^{-\color{red} n}}\implies \cfrac{1}{\frac{1}{a^{\color{red} n}}}\implies a^{{\color{red} n}} \)

  6. gahm8684
    • one year ago
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    so does count as significant, and it is 1 digit

  7. gahm8684
    • one year ago
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    Thanks again

  8. gahm8684
    • one year ago
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    My last question is ames Street, QB 1968-69, led Texas to the National Championship in 1969. His 20 straight victories as a starter are still the best in SWC history. How many significant digits does 20 represent? 1. 1 2. 2 3. impossible to determine 4. 0 5. infinite

  9. gahm8684
    • one year ago
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    I know 20 has 1 digit, but how do i know is not a tricky question and they mean 20.00000 which has infinite digits

  10. gahm8684
    • one year ago
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    I meant 20 has 2 digits

  11. Hero
    • one year ago
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    You interpret 20 as 20 not 20.00000

  12. Hero
    • one year ago
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    And they're asking for the number of significant digits the number 20 has.

  13. Hero
    • one year ago
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    Decimals apply mostly with measurement. 20 in this case is the result of "counting" not "measurement".

  14. Hero
    • one year ago
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    Technically, counting is a form of measurement, but you wouldn't use decimals for counting whole numbers.

  15. gahm8684
    • one year ago
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    But if it was a measurement i would've being like 20.000..... right?

  16. gahm8684
    • one year ago
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    no, it was actually infinate

  17. gahm8684
    • one year ago
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    but what you're saying make sense

  18. Hero
    • one year ago
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    This is one of those "I believe button" type concepts because logically it doesn't make sense, at least not to me, but apparently, "Exact numbers have an infinite number of significant digits".

  19. Hero
    • one year ago
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    I would have picked 1 significant digit which would have been supposedly wrong.

  20. gahm8684
    • one year ago
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    Yeah, i get what you are saying, and it makes perfectly sense. On tuesday I will tell my teacher to explain me more about this. I think it is a tricky question

  21. gahm8684
    • one year ago
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    Thank you so much anyway

  22. gahm8684
    • one year ago
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    have a good weekend

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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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