how do you work out half life problems?

i really got to look up my math terms a half life problem what the heck!!that sounds like a non math life related question......

When a parameter, N, say, decays at a rate proportional to how much of it there is at a given time, we can write that  $$N=N_0e^{-\lambda t}$$  where  $$N_0$$  is the value of N at time t = 0 and  $$\lambda$$  is the decay rate.  The half-life,  $$\tau$$ , is related to  $$\lambda$$  by  $$\tau =\frac{ln2}{\lambda}$$ .

However, this might make more sense if you post a specific half-life question!

zegroes.....The way to work out half-life problems is just to ignore them for the first half of your life........this still leaves you with another half-life to figure them out.....

i wish there were no life problems how bout that?

Me too, zegroes.....me, too.......!!!

I have some real half life problem for you

thumbs up if you know the reference