Please help me solve this

Question

during the first 22 sec of a jump the number of feet that a skydiver falls in t seconds is approximated by the polynomial 11.16t^2 . In 2009,108 skydivers fell headfirst in formation from height of 18,000 ft. How Far had they fallen 20 sec after having jumped from the plane ? 

 

The skydivers had fallen  ? ? in 20 sec after having jumped from the plane 

Answer 1

11.82*20^2 = 4728 ft