document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025891>Question 1025891</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average fuel consumption of vehicles driving the roads can be modeled by<BR>\n" );
document.write( "F(t) = 0.425t2 &#8722; 16.442t + 840.325\r<BR>\n" );
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document.write( "where F(t) represents the gallons per vehicle per year t years since 1970.\r<BR>\n" );
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document.write( "(a) What was the average fuel consumption in 1975? (Round your answer to two decimal places. Include units with your numerical answers.) <BR>\n" );
document.write( "According to the model, in 1975 the average fuel consumption per vehicle per year was______.\r<BR>\n" );
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document.write( "(b) What was the average fuel consumption in 1985? (Round your answer to two decimal places. Include units with your numerical answers.) <BR>\n" );
document.write( "According to the model, in 1985 the average fuel consumption per vehicle per year was_______.\r<BR>\n" );
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document.write( "(c) Find the vertex for this model and explain its meaning. (Round your answer to two decimal places. Include units with your numerical answers.) \r<BR>\n" );
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document.write( "The vertex is (t, F) (______), which means that in______the average fuel consumption per vehicle per year was_______. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #641183 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=641183\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The average fuel consumption of vehicles driving the roads can be modeled by<BR>\n" );
document.write( "F(t) = 0.425t2 &#8722; 16.442t + 840.325 <BR>\n" );
document.write( "where F(t) represents the gallons per vehicle per year t years since 1970. <BR>\n" );
document.write( "(a) What was the average fuel consumption in 1975? (Round your answer to two decimal places. Include units with your numerical answers.) <BR>\n" );
document.write( "According to the model, in 1975 the average fuel consumption per vehicle per year was F(5) = 0.425*5^2 - 16.442^5 + 840.325<BR>\n" );
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document.write( "(b) What was the average fuel consumption in 1985? (Round your answer to two decimal places. Include units with your numerical answers.) <BR>\n" );
document.write( "According to the model, in 1985 the average fuel consumption per vehicle per year was F(10) = 0.425*10^2 - 16.442*10 + 840.325<BR>\n" );
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document.write( "(c) Find the vertex for this model and explain its meaning. (Round your answer to two decimal places. Include units with your numerical answers.)<BR>\n" );
document.write( "Vertex occurs when t = -b/(2a) = 16.442/(2*0.425) = 19.34<BR>\n" );
document.write( "The corresponding F(t) value is F(19.34)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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