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