They do. See wikipedia [significant figures] https://en.wikipedia.org/wiki/Scientific_notation#Significant_figures https://en.wikipedia.org/wiki/Scientific_nota

They do. See wikipedia [significant figures] https://en.wikipedia.org/wiki/Scientific_notation#Significant_figures https://en.wikipedia.org/wiki/Scientific_notation#Significan... In this case, it is pointless though, since the precision is actually known.