I think you have decent odds; I was waitlisted at RBS and got into SAS with a 3.9 GPA and a 30 ACT. I ended up getting into RBS yesterday luckily. I think you definitely need to send some type of letter to an admissions representative; that’s what I did. I’m not sure what your school’s GPA scale is, but maybe you can explain how you’ve improved academically since you started high school / sent in your initial application. Overall, given all the Coronavirus uncertainty I think you are about a 50% shot of getting in. Best of luck and I hope I answered your question.