document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1143817>Question 1143817</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equation y = -x^2 + 10 models the flight of a projectile where y is the height of the projectile in meters x seconds after launch. Determine the height after:\r<BR>\n" );
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document.write( "A) 1 second<BR>\n" );
document.write( "B) 3 seconds<BR>\n" );
document.write( "C) 10 seconds\r<BR>\n" );
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document.write( "I know that this is probably an extremely easy problem, but I don't know where to start. I figured that you were supposed to replace a, b, and c with the x in the problem, but there are two, and I thought that would mess it up. This is for my summer packet, so there's no real rush, I just can't seem to find any online examples of this type of question. Thank you in advance! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #764721 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=764721\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation y = -x^2 + 10 models the flight of a projectile where y is the height of the projectile in meters x seconds after launch. Determine the height after:\r<BR>\n" );
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document.write( "A) 1 second<BR>\n" );
document.write( "x = 1<BR>\n" );
document.write( "h = -1 + 10 = 9 meters<BR>\n" );
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document.write( "B) 3 seconds<BR>\n" );
document.write( "x = 3<BR>\n" );
document.write( "h = -9 + 10 = 1 meter<BR>\n" );
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document.write( "C) 10 seconds<BR>\n" );
document.write( "---> -90 meters.  The projectile impacts before 10 seconds.<BR>\n" );
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document.write( "y = -x^2 + 10 is not the usual equation for projectiles, tho it could be valid on some planet or asteroid.<BR>\n" );
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