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anonymous

  • 5 years ago

Simplify the expression, and write answer in scientific notation

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  1. anonymous
    • 5 years ago
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    where is the expression?

  2. anonymous
    • 5 years ago
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    \[\left( 4.2 \times 10^{-8} \right) \left( 2.4 \times 10^{5} \right)/ 2.4 \times 10^{3}\]

  3. anonymous
    • 5 years ago
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    hold on

  4. anonymous
    • 5 years ago
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    it's suppose to be a fraction (......) over 2.4 blah blah

  5. anonymous
    • 5 years ago
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    I see it

  6. anonymous
    • 5 years ago
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    the dash is the fraction line, right?

  7. anonymous
    • 5 years ago
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  8. anonymous
    • 5 years ago
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    Ohhh okay!

  9. anonymous
    • 5 years ago
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    yes. thank you <3

  10. anonymous
    • 5 years ago
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    Anytime!

  11. anonymous
    • 5 years ago
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    ANSWER: 0.0000042 (.000000042)(240, 000) ____________________________ (2400)

  12. anonymous
    • 5 years ago
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    lmao what?

  13. anonymous
    • 5 years ago
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    Do you know how to find standard notation? And the dashes represent the fraction line.

  14. anonymous
    • 5 years ago
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    I divided top over bottom

  15. anonymous
    • 5 years ago
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    so what is the final answer?

  16. anonymous
    • 5 years ago
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    2400?

  17. anonymous
    • 5 years ago
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    ANSWER: 0.0000042

  18. anonymous
    • 5 years ago
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    \[{(4.2\times10^{-8})(2.4\times10^{5}) \over 2.4\times10^3}=4.2\times10^{-6}\]

  19. anonymous
    • 5 years ago
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    i have to write that answer in scientific notation, that isn't the right answer. it says it's wrong.

  20. anonymous
    • 5 years ago
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    OH I'M SORRY. Then you change the answer I gave you to how many zeros are behind 4. AnwarA is correct.

  21. anonymous
    • 5 years ago
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    thank you anwara

  22. anonymous
    • 5 years ago
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    and thank you OMGirene for the help :]

  23. anonymous
    • 5 years ago
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    Oh, no problem! Sorry for making a mistake.

  24. anonymous
    • 5 years ago
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    can you explain how you got that pls?

  25. anonymous
    • 5 years ago
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    The 2.4 in the top will be cancelled with the one in the bottom. You will be left with 4.8 times some powers of 10's. When you multiply numbers that have the same base you add powers, and when you divide them you subtract powers. So the answer will be \(4.8 \times 10^{-8+5-3}=4.8 \times 10^{-6}\).

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