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.
One pound of beach sand converted to gallon equals to 0.078 gal. How many gallons of beach sand are in 1 pound? The answer is: The change of 1 lb ( pound ) weight unit of beach sand measure equals = to volume 0.078 gal ( gallon ) as the equivalent measure within the same beach sand substance type.