<P> The College Board intentionally schedules the AP Calculus AB exam at the same time as the AP Calculus BC exam in order to make it impossible for a student to take both tests in the same academic year, though the College Board does not make Calculus AB a pre-requisite class for Calculus BC . Some schools do this, though many others only require precalculus as a prerequisite for Calculus BC . The AP awards given by College Board count both exams . However, they do not count the AB subscore piece of the BC exam . </P> <P> The structures of the AB and BC exams are identical . Both exams are three hours and fifteen minutes long, comprising a total of 45 multiple choice questions and six free response questions . </P> <Table> <Tr> <Th> </Th> <Th> Multiple - Choice, Section I Part A </Th> <Th> Multiple - Choice, Section I Part B </Th> <Th> Free - Response, Section II Part A </Th> <Th> Free - Response, Section II Part B </Th> </Tr> <Tr> <Th> #of Questions </Th> <Th> 30 </Th> <Th> 15 </Th> <Th> </Th> <Th> </Th> </Tr> <Tr> <Th> Time Allowed </Th> <Th> 60 minutes </Th> <Th> 45 minutes </Th> <Th> 30 minutes </Th> <Th> 60 minutes </Th> </Tr> <Tr> <Th> Calculator Use </Th> <Th> No </Th> <Th> Yes </Th> <Th> Yes </Th> <Th> No </Th> </Tr> </Table> <Tr> <Th> </Th> <Th> Multiple - Choice, Section I Part A </Th> <Th> Multiple - Choice, Section I Part B </Th> <Th> Free - Response, Section II Part A </Th> <Th> Free - Response, Section II Part B </Th> </Tr>

What is on the ap calculus bc exam