A projectile is launched horizontally from a height of $2\mathrm{.}00$ meters and with a velocity of $450$ m$/$s$.$ Neglecting air resistance and using $9\mathrm{.}8$ m$/$s$\mathrm{ }$

what is the range of the projectile?

  

A projectile is launched at zero height $($i$.$e$.$ y $=0)$ with a speed of $350$ m$/$s and at an angle of $30\mathrm{.}0$ relative to the horizontal axis. Neglecting air resistance and using $9\mathrm{.}8$ m$/$s

for how long is the projectile aloft?