This video helps students work through problem 4 from the 2005 form B AB and BC exams that deals with some applications of the fundamental theorem of calculus. The free-response section of the AP Calculus exam tests your ability to solve problems using an extended chain of reasoning and contains six questions: two that allow the use of a calculator and four that do not. The problem in this video does not permit the use of a calculator. For more AP Calculus videos visit centerofmath.org