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x=1/2at^2+vot 4=1/2(-9.8)t^2+13t quadratic formula... a=-4.9,b=13,c=-4 t=.355,2.298 the first one would be on the way, up so it is 2.298 seconds make it a good day

x=1/2at^2+vot 4=1/2(-9.8)t^2+13t quadratic formula... a=-4.9,b=13,c=-4 t=.355,2.298 the first one would be on the way, up so it is 2.298 seconds make it a good day