e$.$ Write an interpretation.

none of these

The number of residents in San Diego were increasing the fastest at the end of $2015,$ about Oct $2015$

The number of residents in San Diego were increasing the fastest at the end of $2010,$ about Oct $2010$

f$.$ Find the number of residents of San Diego County that were increasing the fastest

lesidentsThe number of residents in San Diego County from $2005$ to $2020$ is approximated by: Source: FRED Economic

Data St Louis Fed.

$R(t)=-266\mathrm{.}07358t^3+4607\mathrm{.}12044t^2+15224\mathrm{.}80298t+2935540\mathrm{.}862$;$0t15$

Where $t$ is the year from $2005$ to is $2005$