Average revenue can be represented in a table or as a curve. For a perfectly competitive firm, the average revenue curve is a horizontal, or perfectly elastic, line. For a monopoly, oligopoly, or monopolistically competitive firm, the average revenue curve is negatively sloped.
Carbon is also the key ingredient for most life on Earth; the pigment that made the first tattoos; and the basis for technological marvels such as graphene, which is a material stronger than steel and more flexible than rubber.
The most common element found in all living things is not, as you would think, oxygen. It is carbon an can be found in every living organism. That is why organic material give â¦ s of Carbon and Oxygen as it rots or burns.