document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1139478>Question 1139478</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Applications of Quadratic Equations​ (Modeling):\r<BR>\n" );
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document.write( "1.If you throw a ball straight up from a rooftop 160 feet high with an initial speed of 48 feet per​ second, then the formula h=-16t^2+48t+160<BR>\n" );
document.write( "describes the​ ball's height h feet above the​ ground, t seconds after you released it. The ball misses the rooftop and eventually strikes the ground.\r<BR>\n" );
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document.write( "a) What is the height of the ball one second after you release​ it? <BR>\n" );
document.write( "Solution​:Find <BR>\n" );
document.write( "the value of h in the formula h​=-16t^2+48t+160 when t=1.<BR>\n" );
document.write( "h=_____ feet<BR>\n" );
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document.write( "b) How long will it take the ball th hit the​ ground? <BR>\n" );
document.write( "Solution​:Find the value of t in the formula h=-16t^2+48t+160 when h=0<BR>\n" );
document.write( "It will take _______ seconds for the ball th hit the ground. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #760007 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=760007\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.If you throw a ball straight up from a rooftop 160 feet high with an initial speed of 48 feet per​ second, then the formula h=-16t^2+48t+160<BR>\n" );
document.write( "describes the​ ball's height h feet above the​ ground, t seconds after you released it. The ball misses the rooftop and eventually strikes the ground.\r<BR>\n" );
document.write( "\n" );
document.write( "a) What is the height of the ball one second after you release​ it? <BR>\n" );
document.write( "Solution​:Find <BR>\n" );
document.write( "the value of h in the formula h​=-16t^2+48t+160 when t=1.<BR>\n" );
document.write( "Do NOT enter h=_____ feet.  How would we use that?<BR>\n" );
document.write( "h(t) = -16t^2+48t+160<BR>\n" );
document.write( "It's h(1)<BR>\n" );
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document.write( "b) How long will it take the ball to hit the​ ground? <BR>\n" );
document.write( "Solution​:Find the value of t in the formula h=-16t^2+48t+160 when h=0<BR>\n" );
document.write( "Yea, do that.<BR>\n" );
document.write( "-16t^2 + 48t + 160 = 0<BR>\n" );
document.write( "Solve for t.<BR>\n" );
document.write( " </SPAN>\n" );
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