Somebody please help

Which best describes how johannes kepler developed his laws of planetary motion

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Type the correct answer in the box. spell all words correctly.what is the correct term for living the most sustainable life you can within your current circumstances? when your are being as sustainable as you can within your current lifestyle, you are said to be sustainability.