Why must a given measurement always be reported to the correct number of significant figures?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

What conclusion can you draw from this experiment about the components of the black ink?