document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=413427>Question 413427</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An object is thrown upward from a height of 50 ft with an initial velocity of 48 ft per sec. The height in feet after t seconds is given by h=-16t^2+48t+50\r<BR>\n" );
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document.write( "a. Find the height of the object 3 sec after it is thrown up\r<BR>\n" );
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document.write( "b. Find the maximum height of the object and the time it takes the object to reach this height </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #290798 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=290798\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An object is thrown upward from a height of 50 ft with an initial velocity of 48 ft per sec. The height in feet after t seconds is given by h=-16t^2+48t+50<BR>\n" );
document.write( "a. Find the height of the object 3 sec after it is thrown up<BR>\n" );
document.write( "b. Find the maximum height of the object and the time it takes the object to reach this height\r<BR>\n" );
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document.write( "h=-16t^2+48t+50<BR>\n" );
document.write( "after 3 seconds,<BR>\n" );
document.write( "a. h(3)=-16*3^2+48*3+50<BR>\n" );
document.write( "       =-144+144+50=50<BR>\n" );
document.write( "What happened is that the object reached its peak then returned to its original height after 3 seconds.\r<BR>\n" );
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document.write( "b.You can use the formula, -b/2a to find the time object reaches its maximum height. a=-16, b=48, <BR>\n" );
document.write( "Time to reach maximum height =-b/2a=-48/2*-16=-48/-32=3/2 seconds<BR>\n" );
document.write( "Maximum height = -16(3/2)^2+(3/2)*48+50=-36+72+50=86 feet\r<BR>\n" );
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document.write( "ans:<BR>\n" );
document.write( "3 seconds after object is thrown upward, it returns to a height of 50 feet going down.<BR>\n" );
document.write( "It takes 1.5 seconds for object to reach its peak after thrown upward.<BR>\n" );
document.write( "Maximum height object will reach=86 feet<BR>\n" );
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