Earth is about 4.5 to 4.6 billion years old. The universe is about 13.7 billion years old.
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3 hours = 3 hours PAST 12 o'clock = (3 x 1 billion) - 4.6 billion = 3 billion - 4.6 billion = -1.6 billion years = 1.6 billion years ago6 hours = 6 hours PAST 12 o'clock = -1.6 billion years + (3 x 1 billion) = -1.6 billion + 3 billion = 1.4 billion years ago
12 years old
12 because 12 + 2 = 14. 12 - 5 = 7, which is half of 14. So in two years you will be twice as old as you are now.
12 years is 378,683,112 seconds.
62 and a half years old.