document.write( "Question 340284: OK....need help been trying for the last hour.. still can't get it.\r
\n" ); document.write( "\n" ); document.write( "Solve using the five-step problem-solving process. Show all steps necessary to arrive at your solution.
\n" ); document.write( "If an object is propelled upward from ground level with an initial velocity of 224 feet per second, its height h in feet t seconds later is given by the equation h = 224t - 16t2. After how many seconds does the object hit the ground?
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #243807 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
Given:
\n" ); document.write( "h = 224t - 16t^2
\n" ); document.write( "where
\n" ); document.write( "h is height in feet
\n" ); document.write( "t is time in seconds
\n" ); document.write( ".
\n" ); document.write( "To determine when the object hit the ground,
\n" ); document.write( "set h to zero (because zero is when the object is on the ground) and solve for t:
\n" ); document.write( "h = 224t - 16t^2
\n" ); document.write( "0 = 224t - 16t^2
\n" ); document.write( "0 = 14t - t^2
\n" ); document.write( "factoring the right side:
\n" ); document.write( "0 = t(14 - t)
\n" ); document.write( "setting each term on the right to zero we get:
\n" ); document.write( "t = {0, 14}
\n" ); document.write( ".
\n" ); document.write( "t=0 is when the object just started its flight
\n" ); document.write( "So,
\n" ); document.write( "t = 14 seconds (solution)\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );