document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189509>Question 1189509</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A softball player throws a ball into the air at an initial velocity of 44 feet per second. The player’s hand is 5 feet from the ground at the time the ball is released.\r<BR>\n" );
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document.write( "Use the formula −16t2 + vt + c = 0.\r<BR>\n" );
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document.write( "t = time in seconds the ball is in the air\r<BR>\n" );
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document.write( "v = initial velocity in feet per second\r<BR>\n" );
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document.write( "c = the initial distance from the ground\r<BR>\n" );
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document.write( "h = the distance above the ground in feet\r<BR>\n" );
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document.write( "Q. How many seconds will the ball stay in the air? Round your answer to the nearest hundredth second.\r<BR>\n" );
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document.write( "a. 1.09<BR>\n" );
document.write( "b. 1.59<BR>\n" );
document.write( "c. 1.82<BR>\n" );
document.write( "d. 2.86 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820880 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=820880\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A softball player throws a ball into the air at an initial velocity of 44 feet per second. The player’s hand is 5 feet from the ground at the time the ball is released.\r<BR>\n" );
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document.write( "Use the formula −16t2 + vt + c = 0.\r<BR>\n" );
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document.write( "t = time in seconds the ball is in the air\r<BR>\n" );
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document.write( "v = initial velocity in feet per second\r<BR>\n" );
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document.write( "c = the initial distance from the ground\r<BR>\n" );
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document.write( "h = the distance above the ground in feet\r<BR>\n" );
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document.write( "Q. How many seconds will the ball stay in the air? Round your answer to the nearest hundredth second.\r<BR>\n" );
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document.write( "a. 1.09<BR>\n" );
document.write( "b. 1.59<BR>\n" );
document.write( "c. 1.82<BR>\n" );
document.write( "d. 2.86<BR>\n" );
document.write( "=====================================<BR>\n" );
document.write( "h(t) = −16t^2 + vt + c = 0<BR>\n" );
document.write( "-16t^2 + 44t + 5 = 0<BR>\n" );
document.write( "<TABLE  BORDER=1>\n" );
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document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=solve_quadratic_equation.solver>SOLVE quadratic equation (work shown, graph etc)</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Quadratic equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2%2Bbx%2Bc=0 ALIGN=MIDDLE  ALT=\"ax%5E2%2Bbx%2Bc=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > (in our case <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16x%5E2%2B44x%2B5+=+0 ALIGN=MIDDLE  ALT=\"-16x%5E2%2B44x%2B5+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >) has the following solutons:<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca ALIGN=MIDDLE  ALT=\"x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  For these solutions to exist, the <U>discriminant</U> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%5E2-4ac ALIGN=MIDDLE  ALT=\"b%5E2-4ac\"   DISABLED_style= \"max-width:90%; height:auto;\" > should not be a negative number.<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  First, we need to compute the discriminant <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%5E2-4ac ALIGN=MIDDLE  ALT=\"b%5E2-4ac\"   DISABLED_style= \"max-width:90%; height:auto;\" >: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%5E2-4ac=%2844%29%5E2-4%2A-16%2A5=2256 ALIGN=MIDDLE  ALT=\"b%5E2-4ac=%2844%29%5E2-4%2A-16%2A5=2256\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  Discriminant d=2256 is greater than zero. That means that there are two solutions: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x%5B12%5D+=+%28-44%2B-sqrt%28+2256+%29%29%2F2%5Ca ALIGN=MIDDLE  ALT=\"+x%5B12%5D+=+%28-44%2B-sqrt%28+2256+%29%29%2F2%5Ca\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "  <BR>\n" );
document.write( "    <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%5D+=+%28-%2844%29%2Bsqrt%28+2256+%29%29%2F2%5C-16+=+-0.10929276087974 ALIGN=MIDDLE  ALT=\"x%5B1%5D+=+%28-%2844%29%2Bsqrt%28+2256+%29%29%2F2%5C-16+=+-0.10929276087974\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "    <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B2%5D+=+%28-%2844%29-sqrt%28+2256+%29%29%2F2%5C-16+=+2.85929276087974 ALIGN=MIDDLE  ALT=\"x%5B2%5D+=+%28-%2844%29-sqrt%28+2256+%29%29%2F2%5C-16+=+2.85929276087974\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "    <BR>\n" );
document.write( "    Quadratic expression <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16x%5E2%2B44x%2B5 ALIGN=MIDDLE  ALT=\"-16x%5E2%2B44x%2B5\"   DISABLED_style= \"max-width:90%; height:auto;\" > can be factored:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16x%5E2%2B44x%2B5+=+%28x--0.10929276087974%29%2A%28x-2.85929276087974%29 ALIGN=MIDDLE  ALT=\"-16x%5E2%2B44x%2B5+=+%28x--0.10929276087974%29%2A%28x-2.85929276087974%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  Again, the answer is: -0.10929276087974, 2.85929276087974.\n" );
document.write( "Here's your graph:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+-16%2Ax%5E2%2B44%2Ax%2B5+%29 ALIGN=MIDDLE  ALT=\"graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+-16%2Ax%5E2%2B44%2Ax%2B5+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ></TD></TR>\n" );
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document.write( "t = ~2.86 seconds\r<BR>\n" );
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document.write( " </SPAN>\n" );
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