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Mathematics, 31.01.2020 02:59 ava9308

You pull out the plug from the bathtub. after 30 seconds, there are 13 gallons of water left in the tub. one minute after you pull the plug, there are 9 gallons left. assume that the number of gallons varies linearly with the time since the plug was pulled. how many gallons of water were in the tub to begin with?
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