document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=808637>Question 808637</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equation h= 7cos(pi/3 t) models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched and then released.<BR>\n" );
document.write( "A. Solve the equation for t.<BR>\n" );
document.write( "B. Find the times at which the weight is first at a height of 1 cm, of 3 cm, and of 5 cm above the rest position. Round your answers to the nearest hundredth.<BR>\n" );
document.write( "C. Find the times at which the weight is at a height of 1 cm, of 3 cm, and of 5 cm below the rest position for the second time. Round your answers to the nearest hundredth. \r<BR>\n" );
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document.write( "I did solve for t.<BR>\n" );
document.write( "So A would be:<BR>\n" );
document.write( "h=7cos((pi/3)t)<BR>\n" );
document.write( "h/7=cos((pi/3)t)<BR>\n" );
document.write( "arccos(h/7)=(pi)(t)/3<BR>\n" );
document.write( "t=3arccos(h/7)/pi\r<BR>\n" );
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document.write( "ANY HELP WOULD BE NICE PLEASE AND 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 #487178 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=487178\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  The equation h= 7cos(pi/3 t) models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched and then released.<BR>\n" );
document.write( "A. Solve the equation for t.<BR>\n" );
document.write( "I did solve for t.<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "h=7cos((pi/3)t)<BR>\n" );
document.write( "h/7=cos((pi/3)t)<BR>\n" );
document.write( "arccos(h/7)=(pi)(t)/3<BR>\n" );
document.write( "t = [3arccos(h/7)]/pi <BR>\n" );
document.write( "------------------------------------\r<BR>\n" );
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document.write( "B. Find the times at which the weight is first at a height of 1 cm, of 3 cm, and of 5 cm above the rest position. Round your answers to the nearest hundredth.<BR>\n" );
document.write( "t(1) = [3*cos^-1(1/7)]/pi = [3*81.79]/pi = 78.10 seconds<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "t(3) = ...... = 61.71<BR>\n" );
document.write( "t(5) = ...... = 42.41<BR>\n" );
document.write( "=============================\r<BR>\n" );
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document.write( "C. Find the times at which the weight is at a height of 1 cm, of 3 cm, and of 5 cm below the rest position for the second time. Round your answers to the nearest hundredth.<BR>\n" );
document.write( "t(1) = 265.67 seconds<BR>\n" );
document.write( "t(3) = 282.06 seconds<BR>\n" );
document.write( "t(5) = 301.36 seconds<BR>\n" );
document.write( "========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "======================= <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );