) The current world record for the 100 m dash is 9.58 s, held by Usain Bolt of Jamaica. Calculate his average speed in miles per hour. Note that 1 mile = 1.609 km.

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Aand b antarctica is a north pole.  field lines enter earth near the north pole.the magnetic pole near antarctica is a north pole.compasses point toward a magnetic pole that is a north pole.field lines circle earth from east to west.a compass can lead a hiker to the geographic north pole.