by **GMAT 5/18** Sun Jun 03, 2007 1:38 pm

mww7786,

I think the best way to solve this would be to use real (smart) numbers. Let's make n = 1. Therefore,

When n = 1, intensity = 1

When n = 2 (n+1), intensity = 10

When n = 3, intensity = 100 (Same as 10^2)

etc, etc

When n = 8, intensity = 10,000,000 (Same as 10^7)

Therefore, the intensity when n = 8 is 10^5 times greater than the intensity when n = 3.

Hope this helps!