Question 372627
The ball hits the ground when {{{h=0}}}.
{{{48t-16t^2=0}}}
{{{t(48-16t)=0}}}
Two solutions:
{{{t=0}}} When the ball starts its trip.
.
.
.
{{{48-16t=0}}}
{{{16t=48}}}
{{{highlight(t=3)}}}seconds.