5 and a half seconds at 486 feet. That is the answer to the example you have given, or whatever. You know how I came up with that? I'm just that intelligent. I have the brain capacity of a super computer. Not one of those old, huge ones from the 50's or whatever, but one of the newer ones they use at NASA. No one gave me the answer. I did it on my own. All by myself. I am that good. For real. Oh yes.