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Mathematics, 22.06.2019 00:00
At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?
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Mathematics, 22.06.2019 01:30
Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?
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