Suppose a deep sea diver dives from the surface to 81 feet below the surface. He then dives down 13 more feet. Find and interpret the sum to describe the diver's present depth.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

answerambulatory;