1.Later that day, Tracy became interested in the maximal height for throwing a ball. On the internet, she finds that the maximum pitching speed of professional baseball players is 150 feet per second (about 105 miles per hour). The equation for the height(in feet) afterseconds of a ball thrown vertically in the air at that speed isy(t)=-16t^2+150t.

At what time would the ball reach a height of 200 feet?