It is not really a low Quant Score. Yes, it is 73rd percentile but the Max score is 51... you are only 4 points away from it. Also as a matter of fact, 49 is an 83rd percentile - not that high either.... DO NOT worry and good luck with your apps!
Great Job on the verbal!
Also, here is a copy of the Average GPA for the top 10 schools (top 9 really) and they are all within your range. (Just in case you were wondering...)
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