How do you find the square root of -24 by simplifying

Which statements are true? see picture

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?