Calculating the Vertical Height of a Kangaroo Jump

[lostfan176]

Homework Statement

A kangaroo jumps to a vertical height of 2.3 m. How long was it in the air before returning to Earth?

Homework Equations

kinamatics

The Attempt at a Solution

i got .68 which i think is rite but i don't know what do you get?

 

[HallsofIvy]

I would much prefer to see HOW you arrived at that answer. Under "relevant equations" you have "kinematics" which NOT an equation! What equations did you use?

 

[lostfan176]

the four kinematic equations

http://www.glenbrook.k12.il.us/gbssci/Phys/Class/1DKin/U1L6a1.gif

i used all of them and still derived at .68