Amound of dirt sits next to a hole that is 8 feet deep by 8 feet wide by 8 feet long. if the dirt was dug out to make the hole, how much dirt is in the pile?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm