Write 5 numbers that are at least 8 digits in standard form

Hello everybody. can anybody me come up with detailed study plan on what topics to study from algebra 1 & 2, trig, and any other topic nesscery for success as a new beginner in pre-calculus. i dont have much math history but the basics. this will greatly me.

Me with this one question, and i'll upvote the brainliest answer

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?