Video Game math problem?

The main character in a video game, Tammy, must swing on a vine to cross a river. If she grabs the vine at a point that is too low and swings within 80 cm of the surface of the river, a crocodile will come out of the river and catch her. From where she is standing on the riverbank, Tammy can reach a point on the vine where her height above the river, h, is modelled by the relation h=12x²-76.8x+198, where x is the horizontal distance of her swing from her starting point. Should Tammy jump? Justify your answer.