Hey! Next time, try this on the flour bomb contest:

• First you need to know how long it takes for the bomb to hit the ground

where h= height and g = gravity (32)
• Next, you need to know the distance you will be traveling in the time 

it takes for the flour bomb to hit the ground.
d = v t  where v = velocity (fps).

Let's say you're going 80 mph (117 fps) and you're 200 feet agl.
First, let's calculate the time:

Now, let's calculate the distance:
d = v t  = 117 fps (3.5) = 409.5 feet

So, if you drop the flour bomb 409.5 feet before you get to the target
you'll hit the mark ( or be beside it if you're not lined up correctly
and, you're going exactly 80mph and 200ft agl).