document.write( "Question 211682: a preson standing close to the edge on the top of a building throws a baseball vertically upward. the equation describeshte ball's heigthabove the ground after t seconds. h=-16t^2+64t+160 a) how many seconds does it take until the ball finally hits the ground? round to tenths. b.) find t=0 and describe what this means. \n" ); document.write( "
Algebra.Com's Answer #159953 by stanbon(75887)\"\" \"About 
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a preson standing close to the edge on the top of a building throws a baseball vertically upward. the equation describeshte ball's height above the ground after t seconds. h=-16t^2+64t+160
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\n" ); document.write( "\n" ); document.write( "a) how many seconds does it take until the ball finally hits the ground? round to tenths.
\n" ); document.write( "-16t^2 + 64t + 160 = 0
\n" ); document.write( "t = [-64 +- sqrt(64^2-4*-16*160)]/-32
\n" ); document.write( "t = [-64 +- sqrt(14336)]/-32
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\n" ); document.write( "Positive solution:
\n" ); document.write( "t = (-64-119)/-32 = 5.74 seconds
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\n" ); document.write( "\n" ); document.write( "b.) find the height of the building by finding h(t=0) and describe what this means.
\n" ); document.write( "h(0) = 160 ft (height of the building)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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