@gracewithin The Aleks Placement Test is designed to help you not only place in the correct course for your ability but also to help you place into the class you want to take. Since there is only one test for all levels of math and the topics could be determined by the college, it is hard to say how hard it will be for you to get a 46.
However, if you don’t get the score you want/need on your first try, you will be able to study using Aleks to prepare for another try. Most colleges require 5 hours in Aleks before a second attempt at the placement test is allowed.
Depending on how close your score is to your desired 46, I would recommend spending more time than your college requires before your second attempt. If your college has a choice of preparation “pies” or courses, make sure you choose the highest one for the course you want to take because you cannot change to a higher one later. Then spend time each day over at least one week, learn the topics in Aleks and try to complete the “pie”. Use the Review feature for any topic that you had trouble learning, needed help on, or took more than 4 questions to learn.