The conversion factors for each of the given equalities in this questions are:
[tex]\frac{1m3}{1000000cm3} = \frac{1000000cm3}{1m3} \\\\= \frac{1*10^{6} cm3}{1m3} = \frac{1*10^{-6} m3}{1cm3} \\\\= \frac{1cm3}{1*10^{-6} m3}[/tex]
[tex]\frac{1in}{2.54cm} = \frac{2.54cm}{1in}[/tex]
[tex]\frac{1ug}{0.000001g} = \frac{0.000001g}{1ug} = \frac{1*10^{-6}g}{1ug} = \frac{1ug}{1*10^{-6}g }[/tex]
[tex]\frac{1Mm}{1000000m} = \frac{1000000m}{1Mm} = \frac{1*10^{6}m }{1Mm} \\\\=\frac{1Mm}{1*10^{6}m }[/tex]
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