document.write( "Question 1181904: A rocket is launched straight upwards with an initial velocity of 80 m/s. The height of the rocket, h, in metres, can be modelled by h = -5t^2 + 80t, where t is the elapsed time in seconds. \n" ); document.write( "
Algebra.Com's Answer #811873 by ikleyn(52775)\"\" \"About 
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