<p>SAT is a little weak for duke or rice, with the ACT score, you're pretty much set (as far as testing goes). you might want to consider refraining from sending your SAT scores</p>
<p>I might redo the chem though, especially if you're going for engineering. I mean, a 780 in chem is only in the 90th percentile, so by percentile that score could be boosted.</p>