If you’ve heard of scientific notation, then you know what exponential notation is: they’re both ways of expressing really large numbers. For instance, you could write 256 as 2*2*2*2*2*2*2*2 or 2^8 (exponential notation).
Here are some resources to help you figure out exponential notation:
Website:
https://saylordotorg.github.io/text_intermediate-algebra/s04-05-rules-of-exponents-and-scienti.html
Videos: