Help me pls!! Identify the following sets by stating the characteristic properties of its elements

B = {-√2;√2}

I'll give brainliest if you answer right : )

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal