Answer
The displacement is $59~mi$ (north)
$v_{ave} = 95.7~mi/h$ (north)
$a_{ave} = 11.4~mi/h~$ (south)
Work Step by Step
The displacement is $185~mi-126~mi = 59~mi$ (north)
$v_{ave} = \frac{displacement}{time}$
$v_{ave} = \frac{59~mi}{(37/60)~h}$
$v_{ave} = 95.7~mi/h$ (north)
$a_{ave} = \frac{\Delta v}{\Delta t}$
$a_{ave} = \frac{105.0~mi/h-112.0~mi/h}{(37/60)~h}$
$a_{ave} = -11.4~mi/h$
$a_{ave} = 11.4~mi/h~$ (south)
