What would you do?
Option 1
You can have $1,000,000
Yeah, that's right a million bucks!!!
Option 2
You can have 1 penny doubled every year for 30 days
Come on, just give me a million dollars!
I've always been kind of partial to pennies!

Further Reading:
 Worksheet Exponential Growth (including problems from this page)
 Exponential Decay functions
 Real world models for exponential growth
 images
 Exponential Growth Activity
 Exponential Growth Applet
 Exponential Growth Interactive Polls (Can you guess the right answer?)