I have an example problem in my book. I have uploaded an image. The part I can't figure out is how to do the last part of the problem to come up with the transmission coefficient. The book gives me a formula but when I plug in all the numbers from the formula in to my calculator I get a completely different answer than the book. The number I get is roughly 0.016 where as the book gets 0.963x10^-38. That is way different than what I'm getting and I'm not sure why. Any help would be awesome.