SOLUTION: If half of the dimes in the United States disappear every 37 years – and are not replaced – how long will it take for the 4.2 billion dimes minted last year to be virtually all g

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: If half of the dimes in the United States disappear every 37 years – and are not replaced – how long will it take for the 4.2 billion dimes minted last year to be virtually all g      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1099038: If half of the dimes in the United States disappear every 37 years –
and are not replaced – how long will it take for the 4.2 billion dimes
minted last year to be virtually all gone?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If half of the dimes in the United States disappear every 37 years –
and are not replaced – how long will it take for the 4.2 billion dimes
minted last year to be virtually all gone?
------------
d = # of dimes, t = # of 37 year periods
d = 4.2e9*0.5^t
"virtually all gone" is not clearly defined math term.
-----
At t = 10, d = 976,563 --> 370 years
At t = 20, d = 954 --> 740 years