document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=212724>Question 212724</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a ball is thrown into the air its velocity is 45ft/s its height in freet after t sec is given by 45t-19t^2. Find the instaneous velocity when t=2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #160642 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=160642\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a ball is thrown into the air its velocity is 45ft/s its height in freet after t sec is given by 45t-19t^2. Find the instaneous velocity when t=2<BR>\n" );
document.write( "------------------------------------------<BR>\n" );
document.write( "If you are studying calculus, evaluate the derivative at t = 2.<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "If h(t) = -19t^2+45t<BR>\n" );
document.write( "then h'(t) = -38t+45<BR>\n" );
document.write( "and h'(2) = -38(2)+45 = -76+45 = -31<BR>\n" );
document.write( "========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );