a living room wall is 13 feet long. How far from the corner would you hace to the edge of a 3ft 8in shelf for it to be centered
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Volume of water in the tank:
Differentiate both sides with respect to time <em>t</em> :
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(The question asks how the height changes at the exact moment the height is 50 cm, but this info is a red herring because the rate of change is constant.)