1) The document is notes from Lesson 42 of a math notebook from December 17, 2012. It includes an assignment due on December 19th and 5 warm-up problems. 2) The lesson defines volume as the total space occupied by a solid and provides the formula for calculating the volume of any prism as the area of the base multiplied by the height. 3) Examples are provided to demonstrate calculating volume but the base and height values are omitted.