Because of the curvature of the earth, the maximum distance D that you can see from the top of a tall building of height h is es
timated by the formula D = 2rh + h2 where r = 3960 mi is the radius of the earth and D and h are also measured in miles. How far can you see from the observation deck of a tall building, 1100 ft above the ground? (Round your answer to one decimal place.)
I'm assuming the question is time it will take for ball to reach ground, if it is then set equation to zero then use the quadratic formula, the possible t value is your answer then