It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
This page from mathsisfun.com explains the meaning of "exponent", discusses exponents and negative exponents, and has a quiz at the end for you to check your understanding.
Search for more info
Use these search terms to find your own resources: