Large helium-filled balloons are used to lift scientific equipment to high altitudes. (a) What is the pressure inside such a balloon (in atm) if it starts out at sea level with a temperature of 10.8°C and rises to an altitude where its volume is eighteen times the original volume and its temperature is  −43.7°C?  (Enter your answer to at least 3 decimal places)  atm (b) What is the gauge pressure? (Enter your answer in atm and to at least 3 decimal places. Assume atmospheric pressure is constant.)  atm

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