document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=639842>Question 639842</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ive been struggling for days to get the answer to this question:<BR>\n" );
document.write( "A ferris wheel has a raidus of 20 m. Passengers get on halfway up on the right side. The direction of rotation is counter clockwise. The bottom of the ferris wheel is 2 m above ground. It rotates every 36 seconds.<BR>\n" );
document.write( "I had to draw it and I think that is right, but I am not sure how to determine a sine function that expresses my height. when h is a function of elapsed time t.<BR>\n" );
document.write( "I got h= -20sinpie/18(t)+22<BR>\n" );
document.write( "And I am lost when they ask to determine my height above the ground after 15 seconds algebraically<BR>\n" );
document.write( "and the the nearest tenth when my height is 38 m above the ground algebraically.<BR>\n" );
document.write( "Please help. I can't do that following questions because I think my equation and graph is wrong! Thank you\r<BR>\n" );
document.write( "\n" );
document.write( "Must be algebraically though 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 #403141 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=403141\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A ferris wheel has a raidus of 20 m. Passengers get on halfway up on the right side. The direction of rotation is counter clockwise. The bottom of the ferris wheel is 2 m above ground. It rotates every 36 seconds. Determine height above the ground after 15 seconds algebraically. Determine seconds to the nearest tenth when height is 38 m above the ground algebraically.<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let t=seconds after wheel starts to rotate.<BR>\n" );
document.write( "let h=meters above ground after wheel starts to rotate<BR>\n" );
document.write( "..<BR>\n" );
document.write( "The formula I got: h(t)=20sin(&#960;t/18)+22<BR>\n" );
document.write( "This is close to the formula you got, except I left the negative sign out since passengers start to  rise after the wheel starts going counter-clockwise.<BR>\n" );
document.write( "..<BR>\n" );
document.write( "After 15 seconds:<BR>\n" );
document.write( "h=20sin(15&#960;/18)+22<BR>\n" );
document.write( "=20sin(5&#960;/6)+22<BR>\n" );
document.write( "=20*(1/2)+22<BR>\n" );
document.write( "=32 m<BR>\n" );
document.write( "..<BR>\n" );
document.write( "When  h=38 m<BR>\n" );
document.write( "38=20sin(&#960;t/18)+22<BR>\n" );
document.write( "38-22=20sin(&#960;t/18)<BR>\n" );
document.write( "20sin(&#960;t/18)=16<BR>\n" );
document.write( "sin(&#960;t/18)=16/20=4/5=.8<BR>\n" );
document.write( "arcsin(.8)=0.927<BR>\n" );
document.write( "&#960;t/18=0.927 (radians)<BR>\n" );
document.write( "t=(.927*18)/&#960;&#8776;5.31<BR>\n" );
document.write( "..<BR>\n" );
document.write( "height above the ground after 15 seconds&#8776;38 m<BR>\n" );
document.write( "seconds elapsed when height is 38 m above ground&#8776;5.3 seconds </SPAN>\n" );
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