Let be the amount of parts the student answered correctly. Suppose that is a function between and the score of a student's project. As the student initially receives a fixed points for turning the project in and points for each correct part, the function is initially:
When the students receive points for each correct part, the coefficient of changes, as the amount of points received per correct answer increases. Thus:
To find the volume (area) of the watermelon (rectangular prism), you use the formula L*W*H. You would replace the letters with numbers so it is 10*2/3*9. When you multiply those numbers, your area is 60 inches squared. Hope I helped!