document.write( "Question 1176636: A golfer attempts to hit a golfball from a platform above the ground. The function that models the height of the ball is: y= -5t^2-40t+100 where y represents the height, in meters, above the ground at the time, t seconds after contact. There are power lines 185m above the ground. Will the golfball hit the power lines? Be clear and concise in your explanation with reference to you worked solution.
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Algebra.Com's Answer #803824 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
set the equation equal to 185, BUT the middle term is the speed of the golfball off the club, and that can't be negative. I will call it +40t
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\n" ); document.write( "y=-5t^2-40t+100=185
\n" ); document.write( "-5t^2+40t-85=0
\n" ); document.write( "divide by -5
\n" ); document.write( "t^2-8t+17=0
\n" ); document.write( "t=(1/2)(8+/- sqrt (64-68)); complex solution. No, it will not hit them.
\n" ); document.write( "vertex is at t=-8/-2 or 4 sec
\n" ); document.write( "y(4)=-80+160+100=180 m\r
\n" ); document.write( "\n" ); document.write( "The curve to the left with vertex at x=-4 is the equation given.\r
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