\displaystyle \mathbf{v}=(80+t\ )\mathbf{i}+(4t \ )\mathbf{j}
\displaystyle \mathbf{r}=\left( 80t+\frac{1}{2}{{t}^{\ 2}} \right)\mathbf{i}+2{{t}^{\ 2}}\mathbf{j}
