1 Research shows youâre around 400% more likely to have too much iron than not enough â and this can pose serious risks to your health. 2  In one study of more than 1,000 people, only 3 percent were iron deficient, but 13 percent had iron overload.
According the Bureau of Printing & Engraving, the average lifespan of a $100 bill is about 22 years.ccording the Bureau of Printing & Engraving, the average lifespan of a $100 bill is about 22 years.
The bond's weighted average life helps investors gauge how quickly bonds pay out returns. The average life is the average length of time that each dollar in the principal remains unpaid. Step 1. Multiply each of the bond's payments by the number of years until the issuer pays each of them. For example, if a bond pays $1,000 after one year, $2,000 after two years and $4,000 after three years, multiply $1,000 by 1 to get $1,000, multiply $2,000 by 2 to get $4,000 and multiply $4,000 by 3 to get $12,000.