When a ball is thrown, its height in feet h after t seconds is given by the equation, h=vt-16t^2 where v is the initial upwards velocity in feet per...

When a ball is thrown, its height in feet h after t seconds is given by the equation, h=vt-16t^2 where v is the initial upwards velocity in feet per second. If v=37 feet per second, find all values of t for which h=20 feet. Do not round any intermediate steps.