Hi! Do you want to play a game of truth or dare? If not pls don't answer

How do astronomers measure the amount of dark matter in the universe

If you walk up stairs,how u gonna pet yo dog? if you go to colloge,how you gonna fly? if you like school how u gonna be a person?

Micheal wants to estimate how much it will cost him each month to own and maintain his car. which of the following costs should not be included in the calculations? routine maintenance? dealer fees? gas? loan payments? wouldn't it be dealer fees? ? idk in advance! : )