document.write( "Question 798565: Have you been to a baseball game lately? Did anybody hit a home run? The trajectory of a baseball is usually very complicated, but we can get help from The Physics of Baseball, by Robert Adair. According to Mr. Adair, after t seconds, starting 1 sec after 35o angle, rotating with an initial backspin of 2000 revolutions per minute (rpm), and hit about 110 mph is given by \n" );
document.write( "H(t) = -80t2 +340t - 260 (in feet) \n" );
document.write( "1. How many seconds will pass before the ball hits the ground? \n" );
document.write( "The distance traveled by the ball is given by \n" );
document.write( "D(t) = -5t2 + 115t – 110 (in feet) \n" );
document.write( "2. How far will the ball travel before it hits the ground? \n" );
document.write( "3. Using D(t), how far will a ball travel in 6 seconds, the time it takes it takes a high fly ball to hit the ground? \n" );
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