But how do I figure out at which point the tangent is hitting the t-axis?
Let's take t=5.0 as an example. The point is (5.0s, 57.5m). I know that when its tangent hits the t-axis, x=0, so all I have is (??s, 0m). I know I'm going about this the wrong way, I just can't figure out how.
EDIT: Ugh... I meant "calculating", of course.
This is an assignment that was due on the 16th. It's already been handed in, I just need some help with a question that I obviously was not able to answer in due time. I am coming back from a long, long hiatus from my academic pursuits and so some...