When Will the Compass Hit the Ground?

[omc1]

Homework Statement

A hot-air balloon is rising upward with a constant speed of 2.51m/s. When the balloon is 3.01m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

Homework Equations

y=ynot+vnotΔt+1/2aΔt^2

The Attempt at a Solution

i used the quadratic equation to find t which was 0.014s
but i don't know where to go from here i have to find the rang but when i do that i get wrong answer

 

[omc1]

actually iam getting the t to be 0.925s

 

[omc1]

wrong math on that ...now its right!