In order to be eligible for a retake you must complete the following Khan Academy Exercises (If your score was <70 they are already sent to you, just check your coach recommendations):

1. Components of Vectors
2. Magnitude of Vectors
3. Graphically adding and subtracting vectors
4. Combined vector operations
5. Unit vectors
6. Direction angles
7. Converting from magnitude and direction form to component form
8. Adding vectors in magnitude and direction form (answer in component form)
9. Vector Word Problems

Once you complete these you can retake your quiz.