document.write( "Question 287568: Foul ball. Suppose Charlie O’Brian of the Braves hits a baseball straight upward at 150 ft/sec from a height of 5 ft.\r
\n" ); document.write( "\n" ); document.write( "Use the formula to determine how long it takes the ball to return to the earth.
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #208427 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Foul ball. Suppose Charlie O’Brian of the Braves hits a baseball straight upward at 150 ft/sec from a height of 5 ft.
\n" ); document.write( "Use the formula to determine how long it takes the ball to return to the earth.
\n" ); document.write( ":
\n" ); document.write( "The formula: h = -16t^2 + 150t + 5
\n" ); document.write( "h = 0 when it hits the ground, so we have
\n" ); document.write( "-16t^2 + 150t + 5 = 0
\n" ); document.write( "Solve this using the quadratic formula; a=-16; b=150; c=5
\n" ); document.write( ":
\n" ); document.write( "You should get a positive solution: t = 9.4 seconds
\n" ); document.write( ":
\n" ); document.write( "looks like this
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-6%2C+12%2C+-200%2C+500%2C+-16x%5E2%2B150x%2B5%29+\" \n" ); document.write( "
\n" );