3.97 UW/4.19W
33 ACT
AP- World History-4, Psychology-5, U.S History-3, Physics-4, English Language and Comp-4
SAT 2- 730 World History, 760 U.S History, 700 Biology, and at the very least 750+ on Math II (most likely 770 or 780)
Somewhere in top 15% (school does not rank)
Next year I will be taking- Regular Spanish, Advanced Science Research, AP Physics C, AP English, AP Calculus BC, AP GOV, AP Micro Macro.
Extracurricular- position(s)
Crew(Rowing) 3 years ( not including senior year)- received varsity letter in fall of sophomore year.
Boys State 2016-City Treasurer, District Attorney, and election board.
Eagle Scout- Assistant Senior Patrol Leader/Troop Guide/ Patrol Leader/Den Leader.
National Honor Society, Social Studies Honor Society-Vice President/Spanish Honor Society/English Honor Society/Science Honor Society.
ISWEEP International Science Fair (got paid trip to Houston to present my science research project)- Silver Medal.
Long Island JV Science Fair- 1st Place.
Religious Organization- Vice President
Colon Cancer Charity- Junior Board Member
School Newspaper-Business Editor and creator of section
International Club-Webmaster
Silver Presidential Volunteer Service Award
Mock Trial- Witness Manager
Tutor for middle schoolers.
(This is not all of my extracurriculars just the most important)
Can I get in RD or would I need ED to have a chance?
Is Cornell your top choice? If so, you lose nothing and will definitely have an advantage doing ED! But I think you have great test scores and ECs so if you want to keep your options more open (and see everywhere you get in before committing), then go for RD.
I have Cornell and Duke narrowed down as my top choices and I am trying to decide which one I should ED to.
Long Island represent 
You have a good shot with RD at Cornell. But if it’s your first choice, you should definitely ED regardless.