Tom=E1s =D3 h=C9ilidhe wrote: > Because it's "per", you divide, so you've got: > > 10e0 divided by 10e5 Oh God I'm wrong again. 1 metre is 10^1, not 10^0. So if you've got metres per 100 km, then that's m^1 / m^5 Then that gives you: m ^ -4 Hopefully this is the last time I correct myself on this! -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist