document.write( "Question 962541: I am not sure if this is in the right section but the question is:\r
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document.write( "On Planet X, the height, in meters, of an object, t seconds after being launched from a device, 30 meters above the ground, is given by h(t) = 88t - 11t^2 + 30. At what time(s), in seconds, will the object be 162 meters above ground?\r
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document.write( "I have gotten to
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document.write( "However When I try factoring, it works out to a decimal when the answers(here they are for reference, page 24, question 69: http://mohandasmohandas.com/african1/Algebra1finalexam2004.pdf) do not have decimals.\r
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document.write( "Thank you for answering!
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Algebra.Com's Answer #588124 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! Height, h(t) is defined as \n" ); document.write( "h(t) = 88t - 11t^2 + 30 \n" ); document.write( "so we substitute 162 for h(t): \n" ); document.write( "162 = 88t - 11t^2 + 30 \n" ); document.write( "0 = 88t - 11t^2 - 132 \n" ); document.write( "reordering terms: \n" ); document.write( "0 = -11t^2 + 88t - 132 \n" ); document.write( "0 = -11t^2 + 22t + 66t - 132 \n" ); document.write( "0 = (-11t^2 + 22t) + (66t - 132) \n" ); document.write( "0 = -11t(t - 2) + 66(t - 2) \n" ); document.write( "0 = (t - 2)(-11t+66) \n" ); document.write( "t = {2,6) \n" ); document.write( " \n" ); document.write( " |