document.write( "Question 188705This question is from textbook
\n" ); document.write( ": Suppose you throw a ball upward with a starting velocity of 30ft/s. The ball is 6ft high when it leaves your hand. After how many seconds will it hit the ground? \n" ); document.write( "
Algebra.Com's Answer #141552 by stanbon(75887)\"\" \"About 
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Suppose you throw a ball upward with a starting velocity of 30ft/s. The ball is 6ft high when it leaves your hand. After how many seconds will it hit the ground?
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\n" ); document.write( "Equation that gives the height of the object after t seconds.
\n" ); document.write( "s(t) = -16t^2 + 30t + 6
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\n" ); document.write( "The height will be zero when the object hits the ground.
\n" ); document.write( "-16t^2 + 30t + 6 = 0
\n" ); document.write( "-8t^2 + 15t + 3 = 0
\n" ); document.write( "Use the quadratic formula to get:
\n" ); document.write( "t = [-15 +- sqrt(225 - 4*-8*3)]/(-16)
\n" ); document.write( "t = [-15 - 17.92]/(-16)
\n" ); document.write( "t = 2.07 seconds
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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