A projectile is launched vertically upward from the top of a 240-foot building. This translate to the model

Question

y = -16t^2 + 32t + 240 where y is the height in feet and t is the time in seconds after it was launched. When will he projectile hit the ground?

would i divide both sides by -16?

if so
t^2-2t-15=0
which i think factors to
(t-15)(t+13)=0

t=15 seconds when it hit the ground.

I am close?

Answer 1

yes