How do you multiply the pemdas symobl

Ppcc assigned a story board on eg.ppcc.edu about a post-apocalyptic world called the books of wisdom. i was wondering if anyone had any advice on how to do well. also is there a way to change you name?

Remote sensing of the earth's surface and atmosphere may involve the use of what type of instruments?

Explain how earth is like a giant bar magnet. how is our magnetic field made?