A 31.78 gram sample of cobalt is heated in the presence of excess oxygen. A metal oxide is formed with a mass of 44.72
g. Determine the empirical formula of the metal oxide.

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

How do you lengthen a pattern piece? (family and consumer science, sewing)