document.write( "Question 556326: Heey, I just can't figure out how to answer this question!
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document.write( "I've tried things, but then I got stuck. Can someone please hep me?
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document.write( "Thanx\r
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document.write( "A projectile is fired vertically upwards and its height in meters after t seconds is given by the formula h=40t-8t^2
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document.write( "Find the time taken by the projectile to first reach a height of 48 meters. \n" );
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Algebra.Com's Answer #362132 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! 48 = 40t - 8t^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "6 = 5t - t^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0 = t^2 - 5t + 6\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0 = (t - 3)(t - 2)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "t = 3 AND t = 2 \n" ); document.write( " |