Answer :

a386
[tex]6.73 * 10^{6}[/tex]
6.73 x 10^6
you work this out by deciding the number by ten until you get to a figure that is between 1 and ten, you then show that you have decided the number by writing,  x 10^6 (6 being the amount you decided by) 
Hope this helps :) 

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