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It takes 9 large pipes 8 hours to drain the pond. On the contrary, it takes 6 small pipes 16 hours to drain a pond. How long will it take 3 large pipes and 5 small pipes to drain the pond?

Well, i recently got Civilization 4. I put the disk in my drive and the usual menu pups up. I press install and nothing happens. It just sits there. I cant even look at the installation window, nothing happens when i click on it. Why cant it run like a normal game?! It worked on other PC's...

Most of us know or at least heard of the parallax, a method to determine how far the stars are. Recently, however, many new discoveries have been made. For example, we have discovered black matter, black holes, warps, etc. We know the speed of light in the vacuum- c, or 299 792 458 m / s. But...