An object dropped from a height of 220 feet will fall according to the equation `h(t) = 220 - 16 t^2`, where t is measured in seconds, and h(t) is measured in feet.

How long will it take for the object to hit the ground? (Hint: What is the value for `h` if the object is on the ground?) seconds

Give your answer as a decimal value, accurate to 2 decimal places