Please answer I don't get it I need work please

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

In the rectangle below ac=30 units what is de

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.