Question $4$: A rifle that shoots bullets at $460\frac{m}{s}$ is to be aimed at a targit $45\mathrm{.}7m$ away. If the cent bullet hits target is level with the rifle, how ligh above the target must the rifle bariel be pointed se that the bullet his dead centre? $)=(9\mathrm{.}8\frac{m}{s^2}$