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 really liked how every topic is broken down and explained. The use of examples that are easy to understand, and then the presentation of more complex examples. – Laura Hernandez, The Victoria School, Colombia