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A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing ar under high pressure -n a spherical air tank that measures 68.0 cm wide. The biologist estimates she will need 1300. L of air for the dive. Calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. Write your answer in atmospheres. Round your answer to 3 significant digits.