Tritium (half life =12.3 y) is used to verify the age of expensive brandies. If an old brandy contains 1/16 of the tritium present in the new brandy, then how long ago was it produced
59.2 years ago. Multiply 1/16 by 2s until you get one: 1/16*2*2*2*2. Every "2" or "*" represents a half life. In this case, there are 4 half lives. Do this: 4*12.3 and you get 59.2
