Obtaining the component part of the letter 'i' warns that it is the velocity is oriented on the X axis. At the same time the numeric part, in this particular case will represent the scalar part and therefore the magnitude of the vector.
The velocity is
[tex]\vec{v} = 48.0\hat{i} \text{ m/s }[/tex]
The vector component of the velocity is
[tex]v_x = 48.0m/s[/tex]
The scalar component of the velocity is
[tex]v = 48.0m/s[/tex]
The magnitude of the velocity is
[tex]v = 48.0m/s[/tex]
