Good luck taking the PAX! I'm sure you'll do just fine. The science part was kinda rough, some of the questions were worded weird. If you've studied at all though you'll be fine. You only need a score of 100 to pass, and I got a 122. I am really super bad at math though. I basically had to re-teach myself how to crunch numbers and fractions and all that jazz after being out of school 11 years. It's all done on a computer, and you'll get scrap sheets of paper. If at any point in time during your test you get a pop up box saying something about how your connection timed out, or something failed to load, just hit the try again button. The test automatically saves where you left off.
The test took me a little under 3 hours to complete. Once you start you can do any section whenever you want, you don't have to wait for other people to take breaks. Reading is first, then math, then science. 60 or 80 questions for reading, 54 for math, and then I think 80 for science. I can't remember, I've tried to black that day out. I stressed forever over the math part, that when I was done all I wanted to do was give my brain a break for a couple months before starting school.
I will say that my experience with the admissions, financial aid, and registration departments at Galen have been awesome thus far. My emails are always answered promptly and I always get a return call back when I call. I know you'll do just fine. Just show up a little early, anywhere from 15-20 minutes early and you'll have plenty of time to turn in study guides, get things copied, or go to the bathroom. Let us know how you did!