<p>Well if you put it that way, reality, he can definitely improve enormously if he studies from 6 AM to 8 PM in which he’ll have done about 3 SAT practice tests, and have left 2 hours in the end to understand all his mistakes. But this is humanly impossible, unless you’re a masochist. So most probably, I don’t think he can do it. Feel free to prove me wrong though, OP, and send me a photo of your SAT score on October 20th ;-)</p>