document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=63909>Question 63909</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0130442631/algebrahomeworkh>Algebra 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Mark launched a model rocket with an initial speed of 180 ft per second.  After how many seconds will Mark's rocket reach a height of 464 ft?<BR>\n" );
document.write( "a) The formula h=rt-16t^2 gives the height of an object projected upward at a rate of r feet per second after t seconds.  Rewrite this equation substituting the data you are given.  <BR>\n" );
document.write( "b) Solve the equation and answer the problem. <BR>\n" );
document.write( "c) After how many seconds will it be at that height again?<BR>\n" );
document.write( "THANK YOU!!!!!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #44556 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=44556\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mark launched a model rocket with an initial speed of 180 ft per second. After how many seconds will Mark's rocket reach a height of 464 ft?<BR>\n" );
document.write( "a) The formula h=rt-16t^2 gives the height of an object projected upward at a rate of r feet per second after t seconds...NO IT IS WRONG ..R IS THE INITIAL VELOCITY AND NOT VELOCITY AT TIME T.. Rewrite this equation substituting the data you are given. <BR>\n" );
document.write( "AT T=0,U=INITIAL SPEED = 180 FPS = R...AT H=464...T=?...SUBSTITUTING<BR>\n" );
document.write( "464=180T-16T^2<BR>\n" );
document.write( "4T^2-45T+116=0<BR>\n" );
document.write( "4T^2-16T-29T+116=0<BR>\n" );
document.write( "4T(T-4)-29(T-4)=0<BR>\n" );
document.write( "(T-4)(4T-29)=0<BR>\n" );
document.write( "T=4....OR......29/4<BR>\n" );
document.write( "THAT IS 4 SECS AFTER START ON ITS UPWARD JOURNEY<BR>\n" );
document.write( "AND 29/4 SECS AFTER START ON ITS DOWNWARD JOURNEY.\r<BR>\n" );
document.write( "\n" );
document.write( "b) Solve the equation and answer the problem. <BR>\n" );
document.write( "c) After how many seconds will it be at that height again?<BR>\n" );
document.write( "THANK YOU!!!!!!<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );