will colleges know of my academic decathlon awards when i apply?
They will if you tell them.
They won’t if you don’t.
In your posting history, you mention your 2.49 unweighted gpa and a 20 on my ACT. It’s nice to have awards and EC accomplishments but in your time remaining during HS, you should concentrate on retaking your ACT and bolstering your GPA. These will have the greatest affect on your future – not choices of major or awards.
Focus your energy on prepping for an ACT re-take and getting the best GPA possible. EVERYTHING else (unless you need to work a job to contribute to family finances) comes a distant third.
Strongly agree with post above.