The quadratic function h (t)=-16t^2+150 models a balls height, in feet, over time, in seconds, after it is dropped from a 15 story building

From the equation, h(t)=-16t^2+150. You are given the height of the building which is 15ft and you are asked to find the time it takes to fall in seconds.

h(t)=-16t^2+150

15=-16t^2+150

15 – 150 = -16t^2

-135 = -16t^2

t = 2.9 seconds

if you was gonna solve for a, a is a   < -12