document.write( "Question 324526: You drop a penny from a 70-foot high bridge. How long does it take for the penny to hit the water below? Neglect the effect of air resistance, round to the nearest 1/10 second and express your answer like: 7.5 s.\r
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document.write( "Can you please help me? Thank you! \n" );
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Algebra.Com's Answer #232270 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! gravitational acceleration is 32 ft/s^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "from a standing start (initial velocity is zero) ___ d = (1/2)a t^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "70 = (1/2)32 t^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "140/32 = t^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "sqrt(140/32) = t \n" ); document.write( " |