solve the equation.
\(6 = -4.9t^2 + 14t - 0.4\)
Hint : it is a quadratic. Take it all to one side and use the quadratic formula.
The height will be above 6m between the time periods.
And for peats sake no one rush in a give a full answer.
This forum is supposed to help people learn!
Asker if you have problems you can show what you have done and maybe we will help you more.