Hello Just wondering on the homework, number 12, when it says full decimal numbers with standard units, what does that mean? Can you give me an example? Thanks The question asked for a full (decimal) number in standard units for each of several quantities. For example: 2.3 mm is the same as 0.0023 m 2.30 mm is the same as 0.00230 m, and indicates that the measurement is accurate to 3 significant figure (i.e., that the 0 at the end was indeed the result of a measurement, that the instrument used was capable of distinguishing between 2.29, 2.30 and 2.31, and it turned out to be 2.30). See if this helps, and let me know if you have additional questions.