Powers represent repeated multiplication of the same factor. The base is the number being multiplied and the exponent indicates how many times the base is used as a factor. Scientific notation is used to write very large or small numbers in a standardized form as a number between 1 and 10 multiplied by a power of 10, moving the decimal place to satisfy this range and noting the number of places moved with the power of 10. For powers to be equal, they must have the same base and equal exponents regardless of the base value.