document.write( "Question 619126: A softball is thrown up into the air. The ball's height in feet is modeled by the equation h(t) = -16t2 + 32t + 5.
\n" ); document.write( "h = height
\n" ); document.write( "t = time in seconds
\n" ); document.write( "Find the maximum height of the ball.
\n" ); document.write( " a) 7.6 feet
\n" ); document.write( " b) 13.9 feet
\n" ); document.write( " c) 8.3 feet
\n" ); document.write( " d) 12.2 feet \n" ); document.write( "
Algebra.Com's Answer #389420 by lwsshak3(11628)\"\" \"About 
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A softball is thrown up into the air. The ball's height in feet is modeled by the equation h(t) =
\n" ); document.write( "-16t2 + 32t + 5.
\n" ); document.write( "Find its maximum height
\n" ); document.write( "**
\n" ); document.write( "This is just an equation of a parabola that opens downwards, so it has a maximum.
\n" ); document.write( "To find the maximum put equation into standard form: y=-A(x-h)^2+k, (h,k)=(x,y) coordinates of the vertex. k or the y-coordinate of the vertex is the maximum height.
\n" ); document.write( "..
\n" ); document.write( "y= -16t^2 + 32t + 5.
\n" ); document.write( "Complete the square
\n" ); document.write( "y= -16(t^2 -2t+1) + 5+16
\n" ); document.write( "y=-16(t-1)^2+21
\n" ); document.write( "ans:
\n" ); document.write( "maximum height of the ball=21 ft
\n" ); document.write( "none of your answers are correct\r
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