The Position of a Particle Is Given By $x ( t ) = 23 t - 1.2 t ^ { 3 }$

Multiple Choice

The position of a particle is given by $x ( t ) = 23 t - 1.2 t ^ { 3 }$ , where x(t) is in meters and t is in seconds. The (positive) time when the particle has zero velocity is

A) 1.2 seconds.
B) 2.5 seconds.
C) 2.3 seconds.
D) 23 seconds.