\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Consider the vectors \(\Vect{u}\) and \(\Vect{v}\) such that \(\|\Vect{u}\|=6\), \(\|\Vect{v}\|=3\) and the angle between them is \(150^{\circ}\) (round to 1 decimal place).
\(\Vect{u} \cdot \Vect{v}=\)