In my experience, this absolutely fits a very common "homework" pattern:
One post only
mount -t ext3 /dev/sda2 /mnt
I know you meant this to be generic, but you would never want to literally mount a device to /mnt. This would hide anything that was mounted to a directory inside /mnt
So, the generalized notation could be "/mnt/<mountpoint>" The "<...>" is the common notation for a placeholder--ie something to be replaced with the real value in the user's situation.