is it possible to track a disposable cell phone? how accurate would it be? could 911 (emergency number) do this? would they just get a guesstimate of where you are? or could they exactly know where you are? could they trace it after you hang up if the cell is still on also?

if you want to know its to know its not for a prank, or to piss anybody off. its to call a suicide hotline, and they if they call 911 on you (like they sometimes do) i was wondering if i could be tracked, also assume the phone has no information that is linked to me when it was activated. plus im just very curious about this.