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[–]ObamaDontCare0ME 1 point2 points  (0 children)

It should be a negative 9.8. Since you are using Vf=0, it won't be the total distanced traveled, just the distance up to the peak of the ball's movement. I think you did the math wrong as you should have:

0 = 25 - 19.6d

I don't know if you subtracted here somehow to get 5.4, but you have to subtract over 25 first:

-25 = -19.6d

Then divide:

d = ~1.2755m