document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=205111>Question 205111</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am an online college student. The name of my book is Blitzer College Algebra 5th edition. This is a student's solution manual. The author is Prentice Hall/Pearson.\r<BR>\n" );
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document.write( "Please help with this problem. I did get part of the solution, but I am not sure how to get the last two parts. This is the problem and what I have so far.\r<BR>\n" );
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document.write( "The path of a falling object is given by the function s=-16t+vot+so where vo represents the initial velocity in ft/sec and so represents the initial height.The variable t is time in seconds, and s is the height of the object in feet.\r<BR>\n" );
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document.write( "a) If a rock is thrown upward with an initial velocity of 32 feet per second from the top os a 40-foot building, write the height equation using this information.<BR>\n" );
document.write( "answer: s=-16t^2+32t+40\r<BR>\n" );
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document.write( "b) How high is the rock after 0.5 seconds?<BR>\n" );
document.write( "answer: 52 feet    solution: s=-16(0.5)^2+32(0.5)+40<BR>\n" );
document.write( "                             s=-16(0.25)+32(0.5)+40<BR>\n" );
document.write( "                             s=-4+32(0.5)=40<BR>\n" );
document.write( "                             s=-4+16+40<BR>\n" );
document.write( "                             s=12+40<BR>\n" );
document.write( "                             s=52 feet\r<BR>\n" );
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document.write( "These next two questions pertain to the same problem, but I am not sure how to get the equations that need to find my answers.\r<BR>\n" );
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document.write( "c) After how many seconds will the rock reach maximum height? \r<BR>\n" );
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document.write( "d) What is the maximum height?\r<BR>\n" );
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document.write( "Your help will be greatly appreciated. Thank you, Rae </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154829 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=154829\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s(t) =-16t^2+32t+40<BR>\n" );
document.write( "a = -16 ; b = 32 ; c = 40<BR>\n" );
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document.write( "These next two questions pertain to the same problem, but I am not sure how to get the equations that need to find my answers. <BR>\n" );
document.write( "c) After how many seconds will the rock reach maximum height?<BR>\n" );
document.write( "Maximum height occurs at t = -b/2a = -32/(2*-16) = 1 second<BR>\n" );
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document.write( "d) What is the maximum height? <BR>\n" );
document.write( "The height when t = 1 is s(1) = -16+32+40 = 56 ft.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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