What are the vertices, edges, and faces

Ineed i do not understand i'm only 8

What is the y intercept of f(x)=(1/2)^x?

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.