The height h(t) of an object at time 't' (seconds) thrown into the air from the height of 62 feet from the ground is given by the equation: h(t) = - 16t2 + 144t + 62 For how long the height of the object will remain more than or equal to 286 ft from the ground? O 6 sec O 5 sec O 7 sec O 2 sec