assume sea level=0
she started at 0.2 below sea level or -0.2
the she hiked and ended at 1.4 above sea level
the distance between any 2 points is
point 1=x
point 2=y
|x-y|=distnace
|| is absolute value bars which basically makes everyghing inside positive
in equation
|-0.2-1.4|=|-1.6|=1.6
the distance is 1.6 miles
