Question 1156079
{{{ h = ( s - 5 ) - 16t^2 }}}
{{{ s = 10*6 = 60 }}} ft
The bottle will hit her on the head when {{{ h = 5 }}} ft
{{{ 5 = 60 - 16t^2 }}}
{{{ -16t^2 = -55 }}}
{{{ t^2 = 55/16 }}}
{{{ t^2 = 3.4375 }}}
{{{ t = 1.854 }}}
She has 1.85 sec to move.
Definitely get a second opinion if
the answer is not already known