Answers to the Practice Problems are below in random order.
\(\begin{align}&0.054\ & \ \ &17.32\ \text{years}\ & \ \ &f^{-1}(x)=\frac{1}{2} e^{\frac{x}{4}} +3\\\\
&0.991\ & \ \ &0.067\ & \ \ &0.997\\\\
&0.263\ & \ \ &0.009\ & \ \ &2803080\\\\
&\frac{4}{3}\ & \ \ &\text{They are complements}\ & \ \ &0.092\\\\
&\text{3 adults say they have it}\ & \ \ &0.917\ & \ \ &91\end{align}\)
\(\begin{align}&0.054\ & \ \ &17.32\ \text{years}\ & \ \ &f^{-1}(x)=\frac{1}{2} e^{\frac{x}{4}} +3\\\\
&0.991\ & \ \ &0.067\ & \ \ &0.997\\\\
&0.263\ & \ \ &0.009\ & \ \ &2803080\\\\
&\frac{4}{3}\ & \ \ &\text{They are complements}\ & \ \ &0.092\\\\
&\text{3 adults say they have it}\ & \ \ &0.917\ & \ \ &91\end{align}\)