document.write( "Question 368388: An arrow is fired straight upward from the ground level with an initials velocity of 208ft per second. During which interval of time will the arrows height exceed 192 ft? Us the position formula: s=-16^2+vot+so
\n" ); document.write( "(vo=initial velocity, so= initial position, t=time) \n" ); document.write( "

Algebra.Com's Answer #262558 by Fombitz(32388) $\"\"$ $\"About$

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Find both values for t when s=192.
\n" ); document.write( " $\"s=-16t%5E2%2B208t%2B0=192\"$
\n" ); document.write( " $\"16t%5E2-208t%2B192=0\"$
\n" ); document.write( " $\"t%5E2-13t%2B12=0\"$
\n" ); document.write( " $\"%28t-12%29%28t-1%29=0\"$
\n" ); document.write( "Clearly the two solutions are $\"t=1\"$ and $\"t=12\"$ .
\n" ); document.write( " $\"DELTA%2At=12-1=highlight%2811%29\"$ seconds.
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