document.write( "Question 1205748: Devonte throws a rock straight down off the edge of a cliff that overlooks the ocean. The distance (𝑑) the rock falls after 𝑡 seconds can be represented by the equation 𝑑 = 16𝑡² + 24𝑡. If the ocean’s surface is 16.4 feet below the cliff, to the nearest tenth, how many seconds will it take for the rock to hit the ocean’s surface? \n" ); document.write( "

Algebra.Com's Answer #842758 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "This time \"t\" is the root of the equation\r\n" );
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document.write( "    h(t) = 0,\r\n" );
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document.write( "or\r\n" );
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document.write( "    16t^2 + 24t = 16.4\r\n" );
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document.write( "    16t^2 + 24t - 16.4 = 0.\r\n" );
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document.write( "Use the quadratic formula and take the positive root.\r\n" );
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