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emobirdy1122
25.06.2020 •
Mathematics
Some scientists believe there is a limit to how long humans can live. One supporting argument is that during the past century, life expectancy from age 65 has increased more slowly than life expectancy from birth, so eventually these two will be equal, at which point, according to these scientists, life expectancy should increase no further. In 1900, life expectancy at birth was 45 years, and life expectancy at age 65 was 75 yr. In 2010, these figures had risen to 78.7 and 84.5, respectively. In both cases, the increase in life expectancy has been linear. Using these assumptions and the data given, find the maximum life expectancy for humans.
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Ответ:
The maximum life expectancy for humans is approximately 87 years.
Step-by-step explanation:
We have to calculate the point in which both linear functions (Life expectancy from birth and Life expectancy from age 65) intersect, as this is the point in which is estimated to be the maximum life expectancy for humans.
NOTE: to simplify we will consider t=0 to the year 1900, so year 2010 becames t=(2010-1900)=110.
The linear function for Life expectancy from birth can be calculated as:
The linear function for Life expectancy from age 65 can be calculated as:
Then, the time t where both functions intersect is:
The time t=136.36 corresponds to the year 1900+136.36=2036.36.
Now, we can calculate with any of both functions the maximum life expectancy:
The maximum life expectancy for humans is approximately 87 years.
Ответ:
During 15 and 16 th century Spain as a beautiful country. they traded goods across the Atlantic ocean.
Explanation:
Spanish empire was very big with a strong naval force. It fought against Ottoman empire, France and in America, Spain wanted its colonies to be independent. Due to the rise of the Portuguese and European powers, Spain lost most of its territories.
Roman Catholic churches were famous in Spain which were brought to America too due to the colonization. Together with Portuguese, Spain entered many international trades. Spanish empire began from 16th century after the arrival of Christopher Columbus after which famous Aztec, Inca and Mayan empire can be seen even today.