Why

I worked my ass off studied 15+ hours in total for this exam and my mark didn’t even change after it’s being graded, I was holding so much hope to boost it from 78 to 80😭😭😭. I did everything I could, unit test reviews, class worksheets, redoing my tests and troubleshooting things I didn’t understand, and I looked on the internet for links to practice. MY MARK DID NOT CHANGE A SINGLE BIT HELPP😭 im literally gonna cry.