document.write( "Question 156303: A model rocket is launched from ground level. Its height, (h) meters above the ground, is a function of time (t) seconds after launch and is given by the equation h= -4.9t^2 + 68.6t. What would be the maximum height, to the nearest meter, attained by the model? \n" ); document.write( "
Algebra.Com's Answer #115230 by ankor@dixie-net.com(22740)\"\" \"About 
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A model rocket is launched from ground level. Its height, (h) meters above the ground, is a function of time (t) seconds after launch and is given by the equation h= -4.9t^2 + 68.6t. What would be the maximum height, to the nearest meter, attained by the model?
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\n" ); document.write( "Find the axis of symmetry of the equation to find the time of max height
\n" ); document.write( "t = \"%28-68.6%29%2F%282%2A-4.9%29\"
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\n" ); document.write( "t = \"%28-68.6%29%2F%28-9.8%29\"
\n" ); document.write( "t = +7 seconds
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\n" ); document.write( "Substitute 7 for t in the equation to find the max height (vertex)
\n" ); document.write( "h = -4.9(7^2) + 68.6(7)
\n" ); document.write( "h = -240.1 + 480.2
\n" ); document.write( "h = +240.1 meters is the max height \n" ); document.write( "
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