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Old Faithful, a famous geyser in Yellowstone National Park, erupts approximately once every 92 minutes. (It used to erupt more frequently, but earthquakes have changed the geyser’s plumbing, so it’s...

In 1896, the first modern Olympics brought in 241 participants. At the 2004 Olympics—when the Olympics returned to Athens—there were 10,625 participants. What is the percent of increase in...