Intermediate algebra

ctions A tourist in a sightseeing balloon drops his cell phone from a height of 710 feet above the ground (see picture). Find the time t (in seconds) for the object to reach the ground. The height (above ground) of the object is modeled by Height = - 16t2 + 710. 710 feet How many seconds will it take the object to hit the ground? t = Preview seconds (round to 5 decimal places.) (If you are curious about the terminal velocity of an object go to http://en.wikipedia.org/wiki/Terminal_velocity )