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Posted by on Wednesday, October 7, 2009 at 4:30pm.

Asking to describe & correct the error in writing the number 81,700,000 in sci. notation.
Standard Form 81,700,00
Product Form 81.7 x 100,000
Scientific notation 81.7 x 10^5

  • Math - , Wednesday, October 7, 2009 at 6:08pm

    You typed both 81,700,00 and 81,700,000. I will assume you meant the second, because of the placement of the commas.

    So Standard form 81,700,000
    = 81.7 * 10^6
    = 8.17 * 10^7


    In scientific notation, we put only _one_ digit before the decimal place, so you will never see
    81.7 x anything, or
    36.7 x anything;
    you always have to add the extra power of ten to make it
    8.17 x something or
    3.67 x something.

    A million (1,000,000) is 10^6 - just count the zeroes as a rule of thumb.

    We're looking to express 81.7 million, so 81.7 x 10^6 is accurate, but it's not in standard form. We need to move the decimal place left one and add a power of 10.

  • Math - , Wednesday, January 11, 2012 at 6:50pm

    8.17 times 10^7

  • Math - , Thursday, October 18, 2012 at 6:19pm

    what is 81.7 x 100,000 in product form

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