document.write( "Question 879538: 5. A bottle rocket is fired from the ground upwards at 64 feet per second. a) What is the maximum height the bottle rocket reaches?
\n" ); document.write( "b) How long does it take for the bottle rocket to hit the ground?
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Algebra.Com's Answer #530897 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+h%28t%29+=+-16t%5E2+%2B+64t+\"$
\n" ); document.write( "When the form is
\n" ); document.write( " $\"+ax%5E2+%2B+b%2Ax+%2B+c+\"$ , the vertex is
\n" ); document.write( "at $\"+t%5Bmax%5D+=+-b%2F%282a%29+\"$
\n" ); document.write( " $\"+t%5Bmax%5D+=+-64%2F%28+2%2A%28-16%29%29+\"$
\n" ); document.write( " $\"+t%5Bmax%5D+=+2+\"$
\n" ); document.write( "Now find $\"+h%282%29+\"$
\n" ); document.write( " $\"+h%282%29+=+-16%2A2%5E2+%2B+64%2A2+\"$
\n" ); document.write( " $\"+h%282%29+=+64+\"$
\n" ); document.write( "The max height is 64 ft
\n" ); document.write( "-----------------------
\n" ); document.write( "The rocket hits the ground when $\"+h%28t%29+=+0+\"$
\n" ); document.write( " $\"+0+=+-16t%5E2+%2B+64t+\"$
\n" ); document.write( " $\"+0+=+t%2A%28+-16t+%2B+64+%29+\"$
\n" ); document.write( "The rocket hits the ground when
\n" ); document.write( " $\"+-16t+%2B+64+=+0+\"$
\n" ); document.write( " $\"+16t+=+64+\"$
\n" ); document.write( " $\"+t+=+4+\"$
\n" ); document.write( "The rocket hits the ground in 4 sec
\n" ); document.write( "--------------------------------
\n" ); document.write( "Here's the plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-1%2C+6%2C+-5%2C+70%2C+-16x%5E2+%2B+64x+%29+\"$ \r
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