Just answer the questions. If you don't know what a logarithm is, then I'd recommend you go here: https://en.wikipedia.org/wiki/Logarithm, and here: https://www.youtube.com/watch?v=zzu2POfYv0Y does not work with letters or punctuation beyond a decimal point, just use numbers please.
Whoever discovered/invented logarithms I guess. And also whoever discovered/invented the change of base formula. also if you need to use this just steal the code you don't gotta give credit bc it's really simple code.