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Verified Answer :

jalynharrington

0.0001 km / year or 10^-5 km/year just take 50 km and divide it by 5 million

AL2006


50 km = 50,000 meters

           (50,000 meters) / (5 million years)

       =    (5 x 10⁴) / (5 x 10⁶)    (meters/year)

       =           1 x 10⁻²      meter/year

       =           1 centimeter per year

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