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Algebra
Question

Heart Disease As age increases, so does the likel...

Heart Disease As age increases, so does the likelihood of coronary heart disease (CHD). The fraction of people \(x\) years old with some \(CHD\) is modeled by \(f ( x ) = \frac { 0.9 } { 1 + 271 e ^ { - 0.122 x } }\)

Answer

\(\left. \begin{array} { l } { \text { 57. (a) } 0.065 ; 0.82 \text { ; Among people age } 25,6.5 \% \text { have } } \\ { \text { some } CHD \text { , while among people age } 65,82 \% \text { have some } } \\ { \text { CHD. (b) } 48 yr } \end{array} \right.\)

Solution
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