document.write( "Question 459071: The height of an object thrown upward with an initial velocity of 96 feet per second is given by the formula h = -16t2 + 96t, where t is the time in seconds. How long will it take the object to reach a height of 144 feet? \n" ); document.write( "

Algebra.Com's Answer #314848 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+h+=+-16t2+%2B+96t+\"$
\n" ); document.write( " $\"+144+=+-16t%5E2+%2B+96t+\"$
\n" ); document.write( " $\"+-16t%5E2+%2B+96t+-+144+=+0+\"$
\n" ); document.write( "

\n" ); document.write( " $\"+a+=+-1+\"$
\n" ); document.write( " $\"+b+=+6+\"$
\n" ); document.write( " $\"+c+=+-9+\"$
\n" ); document.write( " $\"+t+=+%28-6+%2B-+sqrt%28+36+-+4%2A%28-1%29%2A%28-9%29+%29%29%2F%282%2A%28-1%29%29+\"$
\n" ); document.write( " $\"+t+=+%28-6+%2B-+sqrt%28+36+-+36+%29%29+%2F+%28-2%29+\"$
\n" ); document.write( " $\"+t+=+%28-6%29+%2F+%28-2%29+=+3+\"$
\n" ); document.write( "It takes 3 sec to reach a height of 144 ft \n" ); document.write( "

\n" );