document.write( "Question 1173298: A ball thrown upwards with an initial velocity of 5 ms from the roof of a 60-metre tall building.\r
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Algebra.Com's Answer #798583 by Boreal(15235)\"\" \"About 
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the equation is y(t)=-4.9t^2+5t+60
\n" ); document.write( "the vertex, or highest point is when t=-b/2a or -5/-9.8 or 0.51 seconds
\n" ); document.write( "y(0.51)=61.28 m.
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