Question: An oceanographer models the depth $ d(t) $ (in meters) of a marine layer influenced by tidal forces as a cubic polynomial in time $ t $ (in days). It is known that $ d(1) = 1 $, $ d(2) = 8 $, $ d(3) = 27 $, and $ d(4) = 64 $, and $ d(t) $ achieves its minimum depth exactly once. Find $ d(0) $.

Sat, 02 May 2026 22:13:55 +0000

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