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Slav-nsk [51]
3 years ago
10

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?
Mathematics
1 answer:
Rudik [331]3 years ago
8 0

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 LifeExpectancy=LE(x)=55+0.2x, x in years after 1900, then  we have

73=55+0.2x as we isolate for x, x=\frac{73-55}{0.2}=90, finally, we obtain that the birth year which the average life expectancy will be 73 years is 1990

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