Answer :
[tex]\begin{gathered} \text{Solve for the rate for number of voters:} \\ \text{At 2008,} \\ t=0 \\ y(0)=131,\text{ (in millions}) \\ \text{Solve for }a \\ y(t)=ae^{rt} \\ y(0)=ae^{r(0)} \\ 131=ae^0 \\ 131=a(1) \\ 131=a\rightarrow a=131 \\ \text{Substitute at year 2016, where }t=8\text{ (8 years has passed) and }y(8)=139\text{ (in millions)} \\ \text{Solve for }r \\ y(t)=ae^{rt} \\ y(8)=(131)e^{r(8)} \\ 139=131e^{8r} \\ \frac{139}{131}=\frac{131e^{8r}}{131} \\ e^{8r}=\frac{139}{131},\text{ get the natural logarithm of both sides} \\ \ln e^{8r}=\ln (\frac{139}{131}) \\ 8r\ln e=\ln (\frac{139}{131}) \\ 8r=\ln (\frac{139}{131}) \\ r=\frac{\ln(\frac{139}{131})}{8} \\ r=0.007409576241 \\ \text{Convert r into percentage and we have} \\ r=0.007409576241\cdot100\% \\ r=0.7409576241\% \\ r=0.7\%\text{ (rounded off to tenths)} \\ \text{Therefore, the rate for the number of voters is 0.7\%} \end{gathered}[/tex][tex]\begin{gathered} \text{Solve for the rate for population} \\ \text{With 2008 as a starting point for }t=0,\text{ we know that }a=304\text{ (in millions)} \\ \text{We can now solve with }t=8\text{ (8 years has passed), }y(8)=323\text{ (in millions) for }r \\ y(t)=ae^{rt} \\ y(8)=(304)e^{r(8)} \\ 323=304e^{8r} \\ \frac{323}{304}=\frac{304e^{8r}}{304} \\ e^{8r}=\frac{323}{304},\text{ get the natural logarithm of both sides} \\ \ln e^{8r}=\ln \frac{323}{304} \\ 8r\ln e^{}=\ln \frac{323}{304} \\ 8r=\ln \frac{323}{304} \\ r=\frac{\ln \frac{323}{304}}{8} \\ r=0.007578077727 \\ \text{convert to percentage} \\ r=0.007578077727\cdot100\% \\ r=0.7578077727\% \\ r=0.8\%\text{ (rounded to tenth of a percent)} \\ \text{Therefore, the rate for the population is 0.8\%} \end{gathered}[/tex]