document.write( "Question 473190: The equation h=-16t^-64t+250 (i used the symbol ^ to represent t squared) gives the height of a ball, thrown
\n" ); document.write( "downward from the top of a 250-ft building with an initial velocity of 64 ft/s.
\n" ); document.write( "Find the time it takes for the ball to reach a height of 100 ft. Round your answer
\n" ); document.write( "to the nearest thousandth. \r
\n" ); document.write( "\n" ); document.write( "Thank you in advance for your hardwork.
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Algebra.Com's Answer #324514 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
The equation h=-16t^2-64t+250 (i used the symbol ^ to represent t squared) gives the height of a ball, thrown
\n" ); document.write( "downward from the top of a 250-ft building with an initial velocity of 64 ft/s.
\n" ); document.write( "Find the time it takes for the ball to reach a height of 100 ft. Round your answer to the nearest thousandth.
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\n" ); document.write( "Set the height equal to 100 and solve for \"t\":
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\n" ); document.write( "-16t^2-64t+250 = 100
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\n" ); document.write( "-16t^2-64t + 150 = 0
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\n" ); document.write( "Divide thru by -2 to get:
\n" ); document.write( "8t^2 + 32t - 75 = 0
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\n" ); document.write( "Use the quadratic formula to get:
\n" ); document.write( "t = 1.657 seconds
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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