I think it’s m(x)=-(x+7)^4-10
For this case we propose a rule of three. We assume that the excess water received was in one day. So:
cup ------> 100%
x ----------------------------> 25%
Where "x" represents excess water.

Thus, the excess water is
cups.
Then, in one day you receive in total:
cups of water.
Answer:
cups of water

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Answer:
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