Re: 40 Year Old Vs 65 Year Old American Hitting 90
I imagine this could be solved mathematically.
Let f(x) be a function of the average life expectancy of an american male, where x is the year.
Let g(x) be the death rate for american males in one year where x is the age.
Find out where the two functions intersect. If it's > 40 years then you chose the 65 year old.
This is probably wrong and oversimplified but someone who's better at math should be able to solve this.
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