Posted by **Maria** on Friday, September 13, 2013 at 6:43pm.

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir:

r(t)=700−40t.

a) For 0≤t≤30, when does the reservoir have the most water?

b) For 0≤t≤30, when does the reservoir have the least water

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