Two weather tracking stations are on the equator 159 miles apart. A weather balloon is located on a bearing of n 38°e from the western station and on a bearing of n 14°e from the eastern station. How far is the balloon from the western station?.

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.