harp22: How do you calculate 250e^ (-0.4) on the graphing calculator?
e is just a number, it is approximately equal to 2.718
So what you have there is just a number. I suppose you could graph it on a number line but I don't think that is what you meant.
You can work out an approximate value for it on any calculator.
250 * shift e (-0.4) = 167.58
I think that you will need to press the shift key on most calculators to bring up the e
x I hope that helps
+118654 
