Limestone is a sedimentary rock that is composed primarily of calcite. It forms from both the chemical precipitation of calcium carbonate and the transformation of shell, coral, fecal and algal debris into calcite during diagenesis.
To calcu-late the PPF, suppose that Crusoe puts all 8 hours into gathering fruit, so that he gets 36 pounds. But there is no time left for fishing, so he gets 0 pounds of fish. If he takes an hour off from gathering fruit, he gets 35 pounds of fruit and has an hour in which to fishâso he gets 4 pounds of fish.The rest of the PPF is con-structed similarly. 2.ut there is no time left for fishing, so he gets 0 pounds of fish. If he takes an hour off from gathering fruit, he gets 35 pounds of fruit and has an hour in which to fishâso he gets 4 pounds of fish. The rest of the PPF is con-structed similarly. 2.
Robinson Crusoe is a novel by Daniel Defoe,  first published on 25 April 1719. This first edition credited the  work's fictional protagonist Robinson Crusoe as its author, l â¦ eading  many readers to believe he was a real person and the book a  travelogue of true incidents,3 people found this useful.aniel Defoe wrote Robinson crusoe but it was based on a true story of Alexander Selkirk, who was put ashore of the uninhabited island of Juan Fernandez in 1704.