According to the National Wildlife Federation, the polar bear is the largest terrestrial carnivore on Earth. Interestingly, these heavy bears spend much of their time roaming on frozen tundra and remarkably thin ice. Assume a polar bear weighs 980 pounds-force . The polar bear has a circular paw circumference of 37.7 inches . Determine the pressure the ice must be able to withstand if the polar bear is standing on its hind legs such that only two paws are in contact with the ice, in units of pounds-force per square inch .

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