Help please me with this #3

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?