(assume standard facts about real numbers as discussed in class.) prove that 1 er (the real number "one") is the unique real number with the following property for any real number a, one has l'a=a=a.1

Solve for x, y, and z. show all steps.

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

What is the total surface area of this square pyramid?