document.write( "Question 490175: A flare is launched from a life raft with an initial upward velocity of 192 feet per second. how many seconds will it take for the flare to return to the sea? use the formula h=vt-16t^2 \n" ); document.write( "

Algebra.Com's Answer #333886 by Earlsdon(6294) $\"\"$ $\"About$

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$\"h+=+vt-16t%5E2\"$ Find t when h = 0 and v = 192.
\n" ); document.write( " $\"0+=+192t-16t%5E2\"$ Factor out $\"16t\"$ .
\n" ); document.write( " $\"0+=+16t%2812-t%29\"$ Apply the \"zero product\" rule.
\n" ); document.write( " $\"16t+=+0\"$ or $\"12-t+=+0\"$
\n" ); document.write( "If $\"16t+=+0\"$ then $\"t+=+o\"$ This the initial condition when the flare is first launched.
\n" ); document.write( "If $\"12-t+=+0\"$ then $\"t+=+12\"$ This is the time when the flare returns to the sea (height = 0)
\n" ); document.write( "The answer is 12 seconds. \n" ); document.write( "

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