Yes, it's definitely possible. I've had students boost their scores significantly in just 5 days. I'm tutoring a student right now who just started with me and takes her test in three days, and she's already improving a lot. Part of it depends on where you're starting from and what your target score is, of course. Part of it also depends on how much time you'll be able to devote over the next two weeks. But if you focus on the highest-yielding strategies, content areas, and question types, you can make big gains in a relatively short amount of time on the EA.
Yes, that's correct. I explain EA scoring in detail in this video (skip to the ~5:00 mark for an explanation of your question about scores starting at 120): ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mvEp3Osmj0E.htmlsi=RF_tuI2EIz39sHT3