I am on a planet with gravity 9 = 6 ft/s2. I'm standing on a cli edge with altitude of a = 40 ft above the ground and I throw an object straight up at a velocity of 1:! = 25 ft/s so that it will fall over the edge of the cli and to the ground below. The equation 1; = %gt2 + ct + a gives the height y of the object t seconds after I throw it. The graph of height as a function of time will be a parabola. -Find the exact vertex of the parabola. What does the vertex represent in this problem? -Find the exact time in seconds between when the object was thrown and when the object hits the ground