Question: It takes 12 hours to drain a storage tank by opening the valve at the bottom. The depth y of fluid in the tank t

It takes 12 hours to drain a storage tank by opening the valve at the bottom. The depth y of fluid in the tank t hours after the valve is opened is given by the formula y = 6(1 - 1/21) / m.

a. Find the rate dy/dt (m/h) at which the tank is draining at time t.

b. When is the fluid level in the tank falling fastest? Slowest? What are the values of dy/dt at these times?

c. Graph y and dy/dt together and discuss the behavior of y in relation to the signs and values of dy/dt.

y = 6(1 - 1/21) / m.

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