ANSWER
[tex]285\operatorname{kg}\text{m/s}[/tex]
EXPLANATION
To find the momentum of the rocket, we apply the formula:
[tex]p=mv[/tex]
where m = mass; v = velocity
Therefore, we have that the momentum is:
[tex]\begin{gathered} p=15\cdot19 \\ p=285\operatorname{kg}\text{m/s} \end{gathered}[/tex]
That is the momentum of the rocket.
