Saw this post on mathematicians disagreeing on 0^0. It was a little bit interesting, but then this Hacker News comment by Kalid was exceptional. The relevant part -
How would you explain to a 10-year old why 3^0 = 1 beyond "it's necessary to make the algebra of powers work out". I use an "expand-o-tron" analogy to wrap my head around what exponents are really doing: some amount of growth (base) for some amount of time (power). This gives you a "multiplier effect". So, 3^0 means "3x growth for 0 seconds" which, being 0 seconds, changes nothing -- the multiplier is 1. "0x growth for 0 seconds" is also 1, since it was never applied. "0x growth for .00001 seconds" is 0, since a miniscule amount of obliteration still obliterates you.
It was a fascinating discussion, but I'm most interested in the bolded part which says it perfectly - "a minuscule amount of obliteration still obliterates you."
This is very important in business, especially if you're doing online type stuff where many of the probabilities are invisible to you unless you carefully study the analytics. Analytics-inclined people already do this, but in 2011 that's still definitely a minority of the business population.
So if you want to get a sale, you might have something like this -