document.write( "Question 1154557: The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.5. See the figure below.\r
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document.write( "Suppose that the height of the candle after 18 hours is 15 centimeters. What was the height of the candle after 15 hours? \n" );
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Algebra.Com's Answer #777004 by ikleyn(52835)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " In his solution, @josmicely made several errors on the way.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " His check is FALSE, also, and is not \"the check\", at all.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " For correct solution see the post by Alan.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The correct answer is\r \n" ); document.write( "\n" ); document.write( " \r\n" ); document.write( " after 15 hours, the height of the candle was 16.5 cm.\r\n" ); document.write( "\r \n" ); document.write( "\n" ); document.write( "It is clear practically without calculations.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In 3 hours between 15 hours and 18 hours, the height of the candle decreases by 0.5*3 = 1.5 cm.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Therefore, at the 15 hours time moment, the height of the candle was 15 + 1.5 = 16.5 cm. ANSWER\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "--------------\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "@josmicely, please do not consider my post as a trial to make a war with you.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Simply, at this forum we should have a protection service for visitors from errors of tutors ---\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so, I perform this protection service . . . from time to time . . . \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |