If a Stone Is Dropped from a Height of 472 $S = - 73 - 12 t ^ { 2 }$

Multiple Choice

If a stone is dropped from a height of 472 feet, its height after t seconds is given by $S = - 73 - 12 t ^ { 2 }$ . Find the stone's average velocity over the period $[ 2,4 ]$ .

A) -73
B) -69
C) -72
D) -70
E) -74