I am applying to the Sloan School of Business. Unfortunately I haven’t taken a science subject yet which is my weakest subject. I’m thinking of early action to MIT but that means I would have to take a science this november and send it without knowing my score. Do Sloan AOs really care about a high science score?
You apply to MIT and not individual schools.
Before you apply, youd better go look at how Sloan undergrad works.
MIT tells on its admissions web page what testing it expects.