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anonymous

  • one year ago

@mLe What is the product in scientific notation? (2.5x10^-8)(9x10^-10) A. 2.25 x 10^19 B 2.25 x 10^-16 C. 2.25 x 10^-17 D. 2.25 x 10^-18

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  1. anonymous
    • one year ago
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    @mLe

  2. anonymous
    • one year ago
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    i am thinking D 2.25 x 10^-18

  3. mLe
    • one year ago
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    good guess but not quite 22.5 x 10^-18 would have been right ^ but as you can see, there's a little problem with the 22.5 instead of 2.25

  4. anonymous
    • one year ago
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    the second part is confusing bc the 9 is not used ...wait would i do 9 x 10^-10?

  5. mLe
    • one year ago
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    2.5 * 9 = 22.5 ;)

  6. mLe
    • one year ago
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    10^-8 x 10^-10 = 10^-18

  7. anonymous
    • one year ago
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    ahh... y must we learn things we will most likely nvr use :/

  8. mLe
    • one year ago
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    don't jinx it >.> I thought that too, but here I am, teaching you ;P

  9. anonymous
    • one year ago
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    gonna post the next one and i do mental math ...nvr really messed with a calculater so out of my realm of knowledge here...lol

  10. mLe
    • one year ago
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    wait wait wait the answer's not D!

  11. anonymous
    • one year ago
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    i will close this and post right away... it wants the standard form of what is shown in the "calculator"

  12. mLe
    • one year ago
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    meowwww let's get this question right first xD what's the answer to this question??? cuz it ain't D >.>

  13. anonymous
    • one year ago
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    D. is the only one that seems to make sense tho... 2.25 x 10^-18 by elimination process it seems to b the only one that it could be a... the ten to the power of positive 19... i do not see a way with the exponents to get that answer

  14. mLe
    • one year ago
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    22.5 x 10^-18 is what you would get from multiplying it all but that gets you 22.5 NOT 2.25 so move the decimal over ONE more and you'll get 10^-19

  15. anonymous
    • one year ago
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    ok. i did not think of it that way. obviously my powers of scientific notation are slow at best lol ;3

  16. anonymous
    • one year ago
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    totally lost. makes no sense when i try to break it into to and do each separately

  17. mLe
    • one year ago
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    ?

  18. mLe
    • one year ago
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    2.5 times 9 = 22.5 10^-8 times 10^-10 = 10^-18 22.5 = 2.25 x 10^-1 so the original question = 2.25 x 10^-1 x 10^-18 = 2.25 x 10^-19

  19. anonymous
    • one year ago
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    2.25 times 9 would be 2.25 tho bc u have to go 2 decimal places ...i thought

  20. anonymous
    • one year ago
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    srry... i put it wrong just then lol 2.5 * 9 = 2.25

  21. anonymous
    • one year ago
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    u r righ ... it would b 22.5 ...not getting that tho bc i thought u have to count ovr the decimal spacesand some how i found a new non-existant one ,,,wow

  22. anonymous
    • one year ago
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    so if i write the exponents out as numbers would that be easier?

  23. mLe
    • one year ago
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    if you like counting zeros...

  24. anonymous
    • one year ago
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    yeah... not so much besides it confused me more

  25. anonymous
    • one year ago
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    2.5 * 0.0000000011 for ome reason not thinking that is how to get the answer

  26. anonymous
    • one year ago
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    i am thinking the answer is not there... just gonna do an educated guess and move on... just have entirely too much left to spend too much time on it.

  27. mLe
    • one year ago
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    I'm telling yah that is it the one with the 10^-19

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