document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=939123>Question 939123</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The position of a particle as it moves horizontally is described by the given equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%28t%29=12sin+%28pi%2F90%29%28t%29%2B15+ ALIGN=MIDDLE  ALT=\"S%28t%29=12sin+%28pi%2F90%29%28t%29%2B15+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, where S is displacement in meters, t is time in seconds. Determine instantaneous rate of change at t= 7 seconds. How do you calculate this in a calculator because the answer is 0.4064, but I get 0? Also, do I use pi as radians or deg? Please step by step solution! 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 #572174 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=572174\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%28t%29=12sin+%28pi%2F90%29%28t%29%2B15+ ALIGN=MIDDLE  ALT=\"S%28t%29=12sin+%28pi%2F90%29%28t%29%2B15+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <BR>\n" );
document.write( "s'(t) = 12cos((pi/90)t) (pi/90)<BR>\n" );
document.write( "s'(7) = .4064 </SPAN>\n" );
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