document.write( "Question 101841: You threw a ball straight DOWN at an initial velocity of 32 ft/sec from a platform 384 ft tall. How long will it take to hit the ground? \n" ); document.write( "
Algebra.Com's Answer #74044 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
You threw a ball straight DOWN at an initial velocity of 32 ft/sec from a platform 384 ft tall. How long will it take to hit the ground?
\n" ); document.write( ":
\n" ); document.write( "Using the equation (both gravity and initial velocity are downward):
\n" ); document.write( "-16t^2 - 32t + 384 = 0
\n" ); document.write( ":
\n" ); document.write( "Simplify divide equation by -16
\n" ); document.write( "t^2 + 2t - 24 = 0
\n" ); document.write( ":
\n" ); document.write( "Factor:
\n" ); document.write( "(t + 6) (t - 4) = 0
\n" ); document.write( ":
\n" ); document.write( "t = + 4 seconds to hit the ground
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Substitute 4 for t in the original equation to check solution
\n" ); document.write( "-16(4^2) - 32(4) + 384 = 0 \n" ); document.write( "
\n" );