In 2010, the population of a city was 168,000. From 2010 to 2015, the population grew by 7%. From 2015 to 2020, it fell by 6%. H
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Faucet one fills up 
of the bathtub in one minute and faucet two fills up 
of the bathtub in one minute. If both are one then they will fill up 
So, 1/6 of the bathtub in one minute.