I want teacher to help me for my math online quiz

reference. Please let me know if you have any questions about the attached resume. Thank you.

rest. The current unit that our teacher has us on so far is centripetal motion, and I can't recall being taught how to solve this. File attached below shows my work so far, I don't necessarily need the work done for me, but I just want to be put on the right track, such as an equation to start with or what I need to look for. The answer I got was clearly incorrect for part a (which is what I need help with), so please help me get going in the right direction.

he other sides measures should come same for all students. Is it possible?

I want someone on one help so I can understand the concept, I already have the answers to the problems because my teacher had already given me them.