how is scientific notation used in real life
Scientific notation is used to represent a very large amount or very small amount in shorter terms. For example: To write the number 5,000,000,000,000,000,000,000 would take a lot of time and thus people, especially scientists, use scientific notation to shorten the number so it is faster and easier to read and write. So instead of writing 5,000,000,000,000,000,000,000 scientists would right : #5.0xx 10^21#.