The Position Function of a Particle Is Given By $$s = t ^ { 3 } - 10.5 t ^ { 2 } - 2 t , \mathrm { t } \geq 0$$

Short Answer

The position function of a particle is given by
$$s = t ^ { 3 } - 10.5 t ^ { 2 } - 2 t , \mathrm { t } \geq 0$$
When does the particle reach a velocity of $22 \mathrm {~m} / \mathrm { s }$ ?