That you have went one mile. That and in cases of emergency it is also used to locate you. Exits are also based on mile marker, Exit 111 is before, after or right on Mile marker 111, how the actual system works i don't know, like why it resets, it may be a distance between 2 specific points, or something like that
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He traveled 78 miles (237 - 159 = 78).
Notation: ( x , y ) where x is the time passed after noon and y is the mile marker"At exactly noon you pass mile marker 50 in your car"( 0 , 50 )"At 230 pm you pull into a rest stop at mile marker 215"( 2.5 , 215 )"What was your average speed during this time?" Average speed = (change in y) / (change in x) = ( 215 miles - 50 miles ) / ( 2.5 hours - 0 hours)= ( 165 miles ) / ( 2.5 hours ) = 66 miles per hour (mph)
A full running track is a mile long.
Because it never washes or rubs off.
Double marker test is done by blood test.