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is3535

  • one year ago

so hard help

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  1. is3535
    • one year ago
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    |dw:1442255160636:dw|

  2. is3535
    • one year ago
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    @west_coast

  3. is3535
    • one year ago
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    @RainbowBrony555

  4. is3535
    • one year ago
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    @RainbowBrony555

  5. freckles
    • one year ago
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    hello

  6. is3535
    • one year ago
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    hey

  7. freckles
    • one year ago
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    \[\frac{2 \times 10^{21}}{8 \times 10^3} =\frac{2}{8} \times \frac{10^{21}}{10^3} \\ \text{ first step : write } \frac{2}{8} \text{ as a decimal } \\ \text{ second step : write } \frac{10^{21}}{10^3} \text{ as } 10^\text{some number } \\ \text{ using law of exponents } \\ \text{ after performing these two steps I have one more for ya }\]

  8. is3535
    • one year ago
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    2/8 in decimal is 0.25

  9. freckles
    • one year ago
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    ok good and what does 10^(21)/10^3 simplify to in the form I asked

  10. is3535
    • one year ago
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    i dont getit

  11. freckles
    • one year ago
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    do you know law of exponents?

  12. freckles
    • one year ago
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    \[\frac{x^n}{x^m}=x^{n-m} \\ \text{ so } \\ \frac{10^{21}}{10^3}=?\]

  13. is3535
    • one year ago
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    1⋅1018

  14. freckles
    • one year ago
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    not too sure how you got that from the rule I just listed

  15. freckles
    • one year ago
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    \[\frac{x^n}{x^{m}}=x^{n-m} \\ \frac{10^{21}}{10^3}=10^{21-3}=10^?\] what is 21-3 ?

  16. is3535
    • one year ago
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    18

  17. freckles
    • one year ago
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    ok \[\frac{2 \times 10^{21}}{8 \times 10^{3}}=.25 \times 10^{18} \\ \text{ now to write in scientific notation } \\ \text{ you want to make sure there is 1 digit to the left of the decimal } \\ \text{ this digit cannot be 0 }\]

  18. freckles
    • one year ago
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    \[.25 \times 10^{18}=2.5 \times 10^?\] so we need to figure out what this ? needs to be and we are done

  19. is3535
    • one year ago
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    17

  20. freckles
    • one year ago
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    \[.25 \times 10^{18} =(2.5 \times 10^{-1}) \times 10^{18} \\ =2.5 \times 10^{-1} \times 10^{18} \\ =2.5 \times 10^{-1+18} \\ =2.5 \times 10^{17}\] is right

  21. is3535
    • one year ago
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    2.5 x 10^17 is my answer

  22. freckles
    • one year ago
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    |dw:1442256696718:dw|

  23. is3535
    • one year ago
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    yea

  24. is3535
    • one year ago
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    2.5 x 10^17 is my answer

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