document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=591740>Question 591740</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A fire hose shoots water into the air from the ground.  The formula h = -4.9t2 + 7t gives the height in meters t seconds after leaving the ground.  This motion is called projectile motion and the path is the same as a cannon ball shot out of a cannon or a baseball thrown in the air at 7 meters per second could follow.<BR>\n" );
document.write( "a.	Does the graph of this equation resemble a U or an upside down U? How did you determine this? <BR>\n" );
document.write( "b.	Describe what happens the height of a drop of water leaving the hose as time passes? <BR>\n" );
document.write( "c.	Use the method of your choice to find how long it takes water to travel from the tip of the hose back to the ground.<BR>\n" );
document.write( "d.	Will the height peak or be at a low during the middle of the time the water is in the air? How do you know? <BR>\n" );
document.write( "e.	After how many seconds will the peak or low occur? <BR>\n" );
document.write( "f.	How high will the water be when the peak or low occurs? <BR>\n" );
document.write( "g.	What are the coordinates of the vertex? How does this number relate to your answers in parts e and f? <BR>\n" );
document.write( "h.	How many solutions are there to the equation 0 = -4.9t2 + 7t? How do you know? <BR>\n" );
document.write( "i.	To use the quadratic formula to solve an equation like this, we need three values, represented in your text by a, b and c.  In the equation in part h, what are a, b & c?<BR>\n" );
document.write( "j.	What do the solutions represent? Is there a solution that does not make sense? If so, in what ways does the solution not make sense? <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 #375721 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=375721\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "A quadratic with a negative lead coefficient has a graph that is concave down.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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