Lesson Objectives. 1  List the main features of the seafloor: mid-ocean ridges, deep sea trenches, and abyssal plains. 2  Describe what seafloor magnetism tells scientists about the seafloor. 3  Describe the process of seafloor spreading.
Assignment Help. The average diameter of sand dollars on a certain island is 4.50 centimeters with a standard deviation of 1.00 centimeters. If 9 sand dollars are chosen at random for a collection, find the probability that the average diameter of those sand dollars is more than 4.13 centimeters.he average diameter of sand dollars on a certain island is 4.50 centimeters with a standard deviation of 1.00 centimeters.
The largest sand dollar measures 14.8 cm (5.826 in) at its smallest diameter and was found by Dan Manna (USA) in Holmes Beach, Florida, USA, on 11 May 2013. All records listed on our website are current and up-to-date. For a full list of record titles, please use our Record Application Search.