Respuesta :

0.73 s

Explanation:

[tex]v = v_0 + at \Rightarrow t = \dfrac{v - v_0}{a}[/tex]

[tex]t = \dfrac{(5.3\:\text{m/s} - 2.0\:\text{m/s})}{4.5\:\text{m/s}^2} = 0.73\:\text{s}[/tex]