A skateboarder rolls off a bridge into a river. If the skateboarder was originally moving at 7.0 m/s and landed 5.5 m from the bridge, how much time did the skateboarder spend in the air?

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the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

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