The functionh(t)=16t2+120t+300

gives the height in feet of a projectile fired from the top of a building after t seconds.

a. When will the object reach a height of 350 ft? Explain how you gotyour answer.

I applied a quadratic formula and obtained an answer of .39 seconds. i set up problem like

350=-16t2 + 20t +300

i need some assistance with answer mention values of a b and c.

would that be? a= -16 b = 20 c = 300?