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\text{Therefore, } V &= 7970\pm30\text{mm}^3  \end{align*}  }  \end{itemize}  }  \item{A couple ways students could approach measuring reaction time are:  \begin{itemize}  \item{if two students start stopwatches at the same time, then students 1 stops hers unexpectedly, student 2 has to stop his as soon afterwards as he can. Student 2’s reaction time is then given by student 1’s time - student 2’s time}  \item{If students have access to some counting down mechanism (watch, app, etc), then student 1 can set this to a random amount of predetermined time (which is unknown to student 2.) Student 2 then starts his stopwatch at the same time as student 1 starts her countdown. Student 2 then has to stop his stopwatch as soon as the countdown reaches zero and some alarm is given off. Reaction time is then stopwatch time - countdown time}  \end{itemize}  }  \end{itemize}  }  \end{enumerate}