Use the Position Function $s ( t ) = - 16 t ^ { 2 } + 120$

Multiple Choice

Use the position function $s ( t ) = - 16 t ^ { 2 } + 120$ to find the velocity in feet/second at time $t = 2$ seconds. The velocity at time $t = c$ seconds is given by $\lim _ { t \rightarrow c } \frac { [ s ( c ) - s ( t ) ] } { ( c - t ) }$

A) limit does not exist
B) 32 feet/second
C) 64 feet/second
D) 0 feet/second
E) -64 feet/second