document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1154243>Question 1154243</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The table lists a readings for three years. <BR>\n" );
document.write( "​(a) If the quadratic relationship between the carbon dioxide concentration C and the year t is expressed as Upper C equals at squared plus bt plus c​, where t equals 0 corresponds to​ 1962, use a system of linear equations to determine the constants​ a, b, and​ c, and give the equation.<BR>\n" );
document.write( "​(b) Predict the year when the amount of carbon dioxide in the atmosphere will double from its 1962 level.<BR>\n" );
document.write( "Year<BR>\n" );
document.write( "1962<BR>\n" );
document.write( "1992<BR>\n" );
document.write( "2022\r<BR>\n" );
document.write( "\n" );
document.write( "CO2<BR>\n" );
document.write( "318<BR>\n" );
document.write( "341<BR>\n" );
document.write( "371<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #776660 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=776660\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "The table lists a readings for three years. <BR>\n" );
document.write( "​(a) If the quadratic relationship between the carbon dioxide concentration C and the year t is expressed as Upper C equals at squared plus bt plus c​, where t equals 0 corresponds to​ 1962, use a system of linear equations to determine the constants​ a, b, and​ c, and give the equation.<BR>\n" );
document.write( "​(b) Predict the year when the amount of carbon dioxide in the atmosphere will double from its 1962 level.<BR>\n" );
document.write( "Year<BR>\n" );
document.write( "1962<BR>\n" );
document.write( "1992<BR>\n" );
document.write( "2022\r<BR>\n" );
document.write( "\n" );
document.write( "CO2<BR>\n" );
document.write( "318<BR>\n" );
document.write( "341<BR>\n" );
document.write( "371<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">The equation that person gave you is WRONG!! You need to get the correct one!! <BR>\n" );
document.write( "Anyway, when you do, the amount of time that it'll take for the carbon dioxide concentration to double from its 1962 level, <BR>\n" );
document.write( "or from 318 to 636 is: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28matrix%281%2C9%2C+214.3473729%2C+or%2C+215%2C+years%2C+%22%28rounded%29%2C%22%2C+or%2C+the%2C+year%2C+2177%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );