The number "4.60 × 10^-3" is expressed in scientific notation, which is a way to represent very small or very large numbers. In this case, the "-3" exponent indicates that the decimal point in "4.60" should be moved three places to the left. This means that "4.60 × 10^-3" is equivalent to 0.00460. This format is commonly used in fields like science, engineering, and mathematics to simplify calculations and make it easier to read and write numbers that are either very small or very large. For example, it can represent quantities like micrograms or millimeters.