What is 0.042 in scientific notation

Typing is important, because it doesn't take as much time as writing, there is no erasing, not as many pencils will be used in typing, you can easily search up words you don't know, sometimes you won't have access to paper, writing words are simple without having to take your time making it neat, typing can keep your writing organize, fewer trees would be cut down, you can explain what you mean much faster than when you write, and lastly you don't have to sharpen your pencil.