document.write( "Question 34302: A rock is thrown from the top of a tall building. The distance D, in feet, between the rock and the ground T seconds after it is thrown is given by \"d=-16t%5E2-4t%2B350\". How long after the rock is thrown is it 320 feet from the ground? \n" ); document.write( "
Algebra.Com's Answer #20679 by checkley71(8403)\"\" \"About 
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320=-16T~2-4T=350 OR 16T~2+4T-30=0 OR (4T-5)(4T+6)=0 OR T=5/4 SEC OR 1.25 SEC \n" ); document.write( "
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