"Billion" may not be comprehensible, but it's certainly tangible. We'll try to relate it to
things in your everyday world:
-- the number of one-second tick-tocks of your clock in 31.7 years
-- the number of inches from the Anchorage, Alaska airport to the southern tip of South America ...
traveling the long way, via Asia and the South Pole
-- the number of times you have to put 41 drops of water into an olympic swimming
pool in order to fill it to 6-ft deep
-- at 80 characters per line and 55 lines on a page, the number of characters on
227,000 typed pages
-- the number of drops in 14,685 gallons of water
-- the number of 2010 pennies in 2,755.8 tons of pennies
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One billion minutes is equal to 1,000,000,000 minutes. This is because the prefix "bi-" in billion signifies "two" in the International System of Units, indicating a factor of one billion. Therefore, one billion minutes is a very large quantity, equivalent to approximately 1,901 years.
Something that is a billion starts off with 109. Then, 2.7 billion in scientific notation is 2.7 x 109.
Something that is a billion has 9 zeroes. Therefore, 4.3 billion is 4.3 x 109
Something that is a billion starts with base 109. Therefore, the term in scientific notation is 7.0 x109