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.
What Is the Life Span of a Furnace? Have you been limping an aging heating system along for a couple of heating seasons and racking up high heating bills? The average furnace life span is approximately 15 years, though it can range from 13 to 20 years. While the equipment may last that long, itâs likely that your heating bills are higher than they need to be, since furnaces lose efficiency as they age.