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Math Help - scientific notation

  1. #1
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    scientific notation

    This has been melting my brain for a while..... any help? Or the answer lol.


    q = 5 x 10 to the power of 23 and r = 2 x 10 to the power of negative 44. Whats qr?
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  2. #2
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    5 * 10^23 * 2 ^ 10^-44 = 10 * 10 ^(23-44) = 10^-20.
    Hardly brain-melting unless you've scored some good stuff?
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  3. #3
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by Elfiss View Post
    This has been melting my brain for a while..... any help? Or the answer lol.


    q = 5 x 10 to the power of 23 and r = 2 x 10 to the power of negative 44. Whats qr?
    q=5\times 10^{23}
    r=2\times 10^{-44}

    You can first multiply the coefficients together, and then combined the exponents, since they have the same base.

    Therefore, q\times r=5\cdot10^{23}\times 2\cdot10^{-44}=10\times 10^{23-44}=\dots

    Try to take it from here.

    --Chris
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