QuestionThe following model represents the percentage of people of some country at age A years who say they do volunteer work. $$f(A)=-0.0194 A^{2}+1.82 A+9.85$$
Complete parts a through d. \begin{tabular}{|c|c|c|} \hline \begin{tabular}{c} Age Group \\ (years) \end{tabular} & \begin{tabular}{c} Age used to \\ represent age \\ group (years) \end{tabular} & Percent \\ \hline $18-24$ & 21.0 & 39 \\ $25-34$ & 29.5 & 45 \\ $35-54$ & 44.5 & 53 \\ $55-64$ & 59.5 & 51 \\ $65-74$ & 69.5 & 45 \\ over 74 & 80.0 & 29 \\ \hline \end{tabular} a. Estimate the percentage of 25 -year-olds who say they volunteer.
The percentage of 25-year-olds who say they volunteer is 43 . (Round to the nearest whole number as needed.) Did you perform interpolation or extrapolation? Extrapolation Interpolation