An object is dropped from a height of 6,400 feet. The amount of time, in seconds, it takes for the object to hit the ground can be found by solving the equation $\displaystyle-{16}{{t}}^{{2}}+{6},{400}={0}\usepackage{cmbright}\Huge\$ . How many seconds will it take to hit the ground?

The object will take _____ seconds to hit the ground.