1 From the secondhand account, the reader gets more background information about what the Oregon Trail was. 2  From the firsthand account, the reader gets a better understanding why it was so dangerous.
Printers generally age more by the number of pages printed rather than by pure years. The rule of thumb has always been whatever the recommended volume is (for instance 5000 pages per month for a P3005) multiplied by say five or six years so about 300,000 pages would be the life expectancy of the printer.
The life expectancy of a washing machine directly depends on the nature of usage of the machine. If it is used at home and not a laundry, the frequency of usage will not be too often. In such a case, ideally the machine should last for 12-14 years. Some other factors on which life span depends are.