[Ans] What is the estimated lifespan of a U.S. $1 bill?

Step 1 : Introduction to the question "What is the estimated lifespan of a U.S. $1 bill?"

According to the U.S. Federal Reserve, the wear and tear of paper money is gauged by sophisticated processing equipment in order to determine its remaining lifespan. Those not up to scratch are removed from circulation and destroyed. The lifespan of a one dollar bill is a bit longer than you might expect. The Federal Reserve says the average life of a $1 bill in circulation is 5.8 years before it is replaced because of wear and tear. The average lifespan of a $100 bill is 15 years while a $20 bill lasts just 7.9 years. Source: FederalReserve.gov

[Answer] What is the estimated lifespan of a U.S. $1 bill?

Step 1 : Introduction to the question "What is the estimated lifespan of a U.S. $1 bill?"

...According to the U.S. Federal Reserve, the wear and tear of paper money is gauged by sophisticated processing equipment in order to determine its remaining lifespan. Those not up to scratch are removed from circulation and destroyed. The lifespan of a one dollar bill is a bit longer than you might expect. The Federal Reserve says the average life of a $1 bill in circulation is 5.8 years before it is replaced because of wear and tear. The average lifespan of a $100 bill is 15 years while a $20 bill lasts just 7.9 years. Source: FederalReserve.gov

[Ans] What is the estimated lifespan of a U.S. $1 bill?

Step 1 : Introduction to the question "What is the estimated lifespan of a U.S. $1 bill?"

...What is the average life of a $1 bill? As a result, the average lifespan of a $100 bill is 15 years while a $5 bill lasts just 4.9 years. Dollar bills last just under 6 years on average while the $20 bill has a relatively healthy lifespan at 7.7 years.

 How long does a 1 dollar bill last in circulation? That depends on the denomination of the note. A $1 bill lasts 18 months; $5 bill, two years; $10 bill, three years; $20 bill, four years; and $50 and $100 bills, nine years. Bills that get worn out from everyday use are taken out of circulation and replaced.

[Answer] What is the estimated lifespan of a U.S. $1 bill?

Step 1 : Introduction to the question "What is the estimated lifespan of a U.S. $1 bill?"

...The Federal Reserve Bank determines the quality of each bill, or note, that gets deposited into one of its branches. Sophisticated processing equipment evaluates each note as it comes through. The notes that are still in good condition and meet the strict quality criteria of the Federal Reserve go back into circulation. The Fed removes from circulation those that don't meet the required quality standard and destroys them. The larger denominations, such as the $100 bill, tend to stay in circulation longer because they aren't passed between users as frequently as the lower denomination bills. Source: FederalReserve.gov

[Ans] Which penguin species has an estimated population of 12.6 million?

Step 1 : Introduction to the question "Which penguin species has an estimated population of 12.6 million?"

...Although almost all penguin species are native to the Southern Hemisphere, they are not found only in cold climates, such as Antarctica. In fact, only a few species of penguin actually live so far south. Several species live in the temperate zone; one, the Galápagos penguin, lives as far north as the Galápagos Islands, but this is only made possible by the cold, rich waters of the Antarctic Humboldt Current that flows around these islands. Several authors have suggested that penguins are a good example of Bergmann's Rule where larger bodied populations live at higher latitudes than smaller bodied populations. There is some disagreement about this, and several other authors have noted that there are fossil penguin species that contradict this hypothesis and that ocean currents and upwellings are likely to have had a greater effect on species diversity than latitude alone.