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 Dimensions of a Dollar Bill. Throughout the history of the United States, the dollar bill was released in two major formats, namely in large-size notes and in small-size notes. Released in 1862, the large-size one-dollar bill measured approximately 189 by 79 millimeters or 7.4218 by 3.125 inches. This kind of design lasted until the middle parts of the 1920s. After that, the size of all currency was changed to 155.956 by 66.294 by 0.10922 millimeters or 6.14 by 2.61 by 0.0043 inches. Until now, it remains as the standard size of all U.S. currency. Additional Facts and Other Interesting Details