Question 1146035
There should be just one solution since the person
Is already 160 above ground
{{{ s(t) = -16t^2 + 64t + 160 }}}
{{{ s(t) = 100 }}}
{{{ 100 = -16t^2 + 64t + 160 }}}
{{{ -16t^2 + 64t + 60 = 0 }}}
{{{ -4t^2 + 16t + 15 = 0 }}}
Use quadratic formula to solve for {{{t}}}
( use the positive solution ).