The people of a certain tribe produce circular ceramic discs with equal diameter by some rare clay. Anecklace is formed by connecting one or more discs. The figure below shows a necklace made with 4discs. Its length is 4 times the diameter of each disc.The thickness of each disc is fixed. The diameter D and the volume of clay used V has the followingrelationship:p(x) = {0.3√V − V0