Question 1125996
The height is 90 feet, the constant in the equation
maximum height is where t=-b/2a of the quadratic or -38/-32 or t=19/16 sec
putting that into the equation, height max is 112.6 feet

set it equal to 0 to find the landing time
16t^2-38t-90=0, rewriting with positive first term
t=(1/32)(38+/- sqrt (1444+5760)0; sqrt 7200=84.85
t=3.84 sec until it hits the water

{{{graph(300,300,-5,5,-50,150,-16x^2+38x+90)}}}