Ross is building a model of a square pyramid for a class project. the side length
of the square base is 18 inches and the slant height of the pyramid is 19 inches.
what is the surface area of the model pyramid?

This concept of fate became the new meaning of "ming." so the idea of "tian ming," the mandate of heaven, was first used by the kings of the  zhou dynasty,  who  justified their overthrow of the shang by saying that heaven had punished the shang for immorality and transferred its favor to the  zhou.