document.write( "Question 34985: The distance d, in feet, a bomb falls in t seconds is given by $\"d=16t%5E2%2F%281+%2B.06t%29\"$
\n" ); document.write( "How many seconds are required for a bomb released at 21,000 feet to reach its target? (If necessary, round your answer to two decimal places.)\r
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\n" ); document.write( "\n" ); document.write( "A) 1167.12 seconds
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\n" ); document.write( "\n" ); document.write( "B) 185.76 seconds\r
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\n" ); document.write( "\n" ); document.write( "C) 92.88 seconds
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\n" ); document.write( "\n" ); document.write( "D) 2972.19 seconds \n" ); document.write( "

Algebra.Com's Answer #21237 by stanbon(75887) $\"\"$ $\"About$

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The distance d, in feet, a bomb falls in t seconds is given by $\"d=16t%5E2%2F%281+%2B.06t%29\"$ How many seconds are required for a bomb released at 21,000 feet to reach its target? (If necessary, round your answer to two decimal places.) \r
\n" ); document.write( "\n" ); document.write( "A) 1167.12 seconds
\n" ); document.write( "B) 185.76 seconds
\n" ); document.write( "C) 92.88 seconds
\n" ); document.write( "D) 2972.19 seconds \r
\n" ); document.write( "\n" ); document.write( "d=16t^2/(1 +.06t)
\n" ); document.write( "21000(1+0.06t)=16t^2
\n" ); document.write( "21000+1260t-16t^2=0
\n" ); document.write( "4t^2-315t-5250=0
\n" ); document.write( "Graphing this I find the zero at 92.88 seconds.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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