An object is propelled vertically upward from the top of a 256-foot building. The quadratic function models the ball's height above the ground, in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary

Question

An object is propelled vertically upward from the top of a 256-foot building. The quadratic function  models the ball's height above the ground, in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary

anonymous · Answer

someone help me please!!!!

zzr0ck3r · Answer

what is the quadratic equation?

zzr0ck3r · Answer

this is asking you to find the x-interceots, also known as zeros also known as roots. 
you need to find the roots of the equation and then, only one of them will make sense.