Subaru Racing it training a new pit crew. In its first practice run, the crew was able to complete all the tasks in exactly 30 seconds. The second time the crew performs the task it shaves off 4.5 seconds.
“Dare-devil” Williams, the VP for Subaru Racing, requires that the pit crew must be able to perform the task in 15 seconds or less to be competitive. Using your result from part a., how many times must the pit crew rehearse this task before it breaks the “15 second barrier?”