an object takes 0.35 seconds to hit the floor, what height did it fall from?
is the way to calculate it
h = gt^2 / 2
so would it be =
h = .5 * 9.8 * 0.35^2
yes that's correct
just don't forget that your answer is in meters, since you used 9.8
many teachers will count off if you don't include units in your answer