Help if you can plzz

Which two following best identify the central themes of this speech in the passage the man in the arena

What is most often given a value of zero to describe an object’s position on a straight line? displacement reference point distance ending location

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.