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Math Help - scientific notation

  1. #1
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    scientific notation

    compute the expressions using scientific notation, and write your
    answer in that form.

    (4 x 10^-3) ( 2 x 10^-5) =

    (4)(x)(10^(-3))(2)(x)(10^(-5))

    (4)(x)((1)/(10^(3)))(2)(x)(10^(-5))

    (4)(x)((1)/(1000))(2)(x)(10^(-5))

    (4)(x)((1)/(1000))(2)(x)((1)/(10^(5)))

    (4)(x)((1)/(1000))(2)(x)((1)/(100000))

    (4*x)((1)/(1000))(2)(x)((1)/(100000))

    (4x)((1)/(1000))(2)(x)((1)/(100000))

    (4x*(1)/(1000))(2)(x)((1)/(100000))

    ((x)/(250))(2)(x)((1)/(100000))

    ((x)/(250)*2)(x)((1)/(100000))

    ((x)/(125))(x)((1)/(100000))

    ((x)/(125)*x)((1)/(100000))

    ((x^(2))/(125))((1)/(100000))

    ((x^(2))/(125)*(1)/(100000))

    ((x^(2))/(12500000))

    (x^(2))/(12500000)
    Last edited by CaptainBlack; July 26th 2007 at 12:01 PM.
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by lizard4 View Post
    compute the expressions using scientific notation, and write your
    answer in that form.

    (4 x 10^-3) ( 2 x 10^-5) =
    The "x"s here aren't variables, they are the multiplication symbol. So we have
    (4 \times 10^{-3})(2 \times 10^{-5})

    = (4 \times 2) \times (10^{-3} \times 10^{-5})

    = 8 \times 10^{-3 + -5} = 8 \times 10^{-8}

    -Dan
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