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cohankinney
I believe the answer is A, as long at that 107 is 10 to the 7th power. :)
baseballboyg
A.  [tex]8.2*10^{7}[/tex]

Put the decimal between the first two significant figures (in this case, 8 and 2).  Then count how many times you have to move it to the right to get to the end of the original number, that's your exponent.

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