According to one mathematical model, the average life expenctancy for American men born in 1900 was 55 years. Life expectancy ha s increased by about 0.2 year for each birth year after 1900. If this trend continues, for which birth year will the average life expentancy be 73 years?
1 answer:
Answer:
If this trend continues, life expectancy will be 73 years in the year 1990
Step-by-step explanation:
Hi
first of all, we build a model with the knowns of the problem, so we have in years after 1900, then we have
as we isolate for , , finally, we obtain that the birth year which the average life expectancy will be 73 years is 1990
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