Question
Use a calculator to help solve each problem.The life expectancy l of white females can be estimated by using the function l=78.5(1.001)^{x}, where $x$ is the current age. Find the life expectancy of a white female who is currently 50 years old. Give the answer to the nearest tenth.
Step 1
In this case, $x$ is the current age, which is 50 years old. So, we substitute $x = 50$ into the function $l=78.5(1.001)^{x}$. Show more…
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Life expectancy of white females. Life expectancy improved more for females than for males during the $1940 \mathrm{s}$ and $1950 \mathrm{s}$ due to a dramatic decrease in maternal mortality rates. The function $$L=78.5(1.001)^{a}$$ can be used to model life expectancy $L$ for U.S. white females with present age $a$. a) To what age can a 20 -ycar-old white female expect to live? b) Bob, $30,$ and Ashley, $26,$ are an average white couple. How many years can Ashley expect to live as a widow? c) Interpret the intersection of the life expectancy curves in the accompanying figure.
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