document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=348118>Question 348118</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A little girl throws a Frisbee. It is 3 feet above the ground at the time she lets go. The Frisbee follows a parabolic path and after 5 seconds it is 6 feet above the ground. After 10 seconds it is again six feet above the ground.\r<BR>\n" );
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document.write( "a. Write the particular equation of the quadratic<BR>\n" );
document.write( "b. How high is the frisbee after 3 seconds?<BR>\n" );
document.write( "c. How high is the frisbee after 12 seconds?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #248904 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=248904\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A little girl throws a Frisbee. It is 3 feet above the ground at the time she lets go. The Frisbee follows a parabolic path and after 5 seconds it is 6 feet above the ground. After 10 seconds it is again six feet above the ground.<BR>\n" );
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document.write( "You have three points: (0,3),(5,6),(10,6)<BR>\n" );
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document.write( "a. Write the particular equation of the quadratic<BR>\n" );
document.write( "Substitute each point-pair into the following form <BR>\n" );
document.write( "to get three equations with variables a,b,c.<BR>\n" );
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document.write( "Form ax^2 + bx + c = y<BR>\n" );
document.write( "0   +  0  + c = 3<BR>\n" );
document.write( "25a + 5b  + c = 6<BR>\n" );
document.write( "100a+10b  + c = 6<BR>\n" );
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document.write( "Solve by any method you know to get:<BR>\n" );
document.write( "f(x) = -0.06x^2 + 0.9x + 3<BR>\n" );
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document.write( "b. How high is the frisbee after 3 seconds?<BR>\n" );
document.write( "f(3) = 5.16 ft.<BR>\n" );
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document.write( "c. How high is the frisbee after 12 seconds?<BR>\n" );
document.write( "f(12) = 5.16 ft.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "stan H.<BR>\n" );
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