Answer:
It will take 80 seconds for the bullet to hit the ground
Explanation:
The given formula is:
[tex]h=-16t^2+v_0t+8[/tex]
where
[tex]\begin{gathered} h=8ft \\ v_0=1280 \end{gathered}[/tex]
we have:
[tex]\begin{gathered} 8=-16t^2+1280t+8 \\ 16t^2-1280t=0 \\ 16t(t-80)=0 \\ t=0 \\ OR \\ t=80 \end{gathered}[/tex]
t = 80 is realistic, so we say 80 seconds is the time it will take for the bullet to hit the ground
