A blue ball is thrown upward with an initial speed of 23.9 m/s, from a height of 0.7 meters above the ground. 2.9 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 9.6 m/s from a height of 31.1 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2. how long after the blue ball is thrown are the two balls in the air at the same height? I have checkedsig-figs, redone the equation, used wolframalpha, and yet the question is wrong. Thanks for the help.

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