document.write( "Question 1058759: If a Baseball is thrown straight upward from level ground with an intial velocity of 72 ft/sec, its altitude s (in feet) after t seconds is given by s = -16t^2 + 72t. For what values of t will the ball be at least 32 feet above the ground?
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Algebra.Com's Answer #673876 by Alan3354(69443) $\"\"$ $\"About$

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If a Baseball is thrown straight upward from level ground with an intial velocity of 72 ft/sec, its altitude s (in feet) after t seconds is given by s = -16t^2 + 72t. For what values of t will the ball be at least 32 feet above the ground?
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\n" ); document.write( "s = -16t^2 + 72t
\n" ); document.write( "For s = 32: -16t^2 + 72t = 32
\n" ); document.write( "Solve for t.
\n" ); document.write( "You get 2 times, one ascending, one descending.
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