I have the sat in about 2 weeks. If i study more and 5 hours a day for 2 weeks and take practice tests much as possible review my formulas and practice my weaknesses in ea h section could my score jump from 900 to 1100 in two weeks?
It is very much possible. But it will take a lot of hard work. First of all, identify the section in which you can score the most. Either the EBRW or the Math section. After that, go on Khan Academy and practice it as much as is possible. For now, your main goal is accuracy instead of pace. With a week or so left, start taking practice test ONLY for the section you practiced earlier. Then with three days or so left, take two practice tests. This should probably increase your score a lot.
Peace!