Boyle's Law states that when a sample of gas is compressed at a constant temperature, the pressure P and volume V satisfy the equation PV = C, where C is a constant. Suppose that at a certain instant the volume is 600 cm3, the pressure is 120 kPa, and the pressure is increasing at a rate of 30 kPa/min. At what rate is the volume decreasing at this instant? cm3/min

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