Question $24($Bonus$)(2$ points$)$

Listen

BONUS $(2$ points possible total$)$: The position of a particle is given by the function $s(t)=sin(5t)cos(4t)$ where $s$ is measured in meters and $t$ in seconds. Find the velocity of the particle after $$ seconds and enter your answer below.

You must show work to receive full bonus points.

${?}^A$