Our answer has a repeating string of decimals and it goes on and on. However, we always choose the smallest number of significant figures, so, because the value given for the time (2.71 s) has only 3 significant figures, we will write our answer in the same manner: 8.56 m/s.
Tip: Make sure you round your last significant figure – In our case, 8.557… was rounded up to 8.56.
I like how each topic was broken down into several subtopics and each was explained pretty in depth. Not only did this give structure to my studying but it also offered and organized system of all the topics I was required to know and it kept track of my progress. – Mikas H., Shanghai American School, China