document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1152589>Question 1152589</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The function h(t)=25-10cos(pi/3x) gives the height above the ground, in feet, of a passenger on a ferris wheel x minutes after the ride begins. During one revolution of the ferris wheel, for how many minutes is the passenger at least 25 feet above the ground?<BR>\n" );
document.write( "Thank you for any help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #774634 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=774634\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The function h(t)=25-10cos(pi/3x) gives the height above the ground, in feet, of a passenger on a ferris wheel x minutes after the ride begins. During one revolution of the ferris wheel, for how many minutes is the passenger at least 25 feet above the ground?<BR>\n" );
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document.write( "You should clarify:<BR>\n" );
document.write( "cos((pi/3)x) ?<BR>\n" );
document.write( "Or cos(pi/(3x)) ?<BR>\n" );
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document.write( "Also, it's h(x)<BR>\n" );
document.write( "h(x)=25-10cos(x*pi/3)<BR>\n" );
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document.write( "25 is the mid-line of the sinusoid, so it's 1/2 of the cycle.<BR>\n" );
document.write( "Once cycle is 2pi*(3/pi) = 6 minutes<BR>\n" );
document.write( "1/2 that is 3 minutes.<BR>\n" );
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