An object is thrown upward at a speed of 124 feet per second by a machine from a height of 9 feet off the ground. The height h\displaystyle {h} of the object after t\displaystyle {t} seconds can be found using the equation h=16t2+124t+9\displaystyle {h}=-{16}{t}^{{2}}+{124}{t}+{9}

When will the height be 80 feet?




When will the object reach the ground?