Solve.The volume V of a given mass of gas varies directly as the temperature T and inversely as the pressure P. A measuring device is calibrated to give 
when 
and 
What is the volume on this device when the temperature is 
and the pressure is 
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A. V = 291 in3
B. V = 311 in3
C. V = 21.5 in3
D. V = 301 in3
Answer: D
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