You are skateboarding on top of a small hill and take a break. You have 100 j of potential energy. If your mass is 80 kg, how high is the hill you are skating on?.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

Parents and friends
to have trust
to be comfortable with that person