Question 319110
{{{h=560t-16t^2=3136}}}
{{{16t^2-560t+3136=0}}}
{{{t^2-35t+196=0}}}
{{{(t-28)(t-7)=0}}}
Two solutions:
{{{t-7=0}}}
{{{highlight(t=7)}}}<--- When the rocket is on its way up.
.
.
.
{{{t-28=0}}}
{{{highlight(t=28)}}}<--- When the rocket is on its way down.