The average gain in life expectancy at birth in the US has remained almost constant for
Chapter 4, Problem 4.2.41(choose chapter or problem)
The average gain in life expectancy at birth in the US has remained almost constant for 150 years, at an increase of 3 months in life expectancy per year.12 Assume that this rate of increase continues. Life expectancy in the US in 2009 was 78.1 years. (a) Is life expectancy increasing linearly or exponentially? (b) Find a formula for life expectancy, L, in years, in the US at birth as a function of the number of years t since 2000. (c) What is the predicted life expectancy for babies born in 2050?
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