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Please answer ASAP The depth of water, d feet, in a channel t hours after midnight is d = 4 cos t 5 +9. Find

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The depth of water, d feet, in a channel t hours after midnight is d = 4 cos t 5 +9. Find the channel depth at (a) 3 P.M. (low tide). (b) 10 A.M. (high tide). .. . (a) The channel depth at 3 P.M. is feet. (Simplify your answer.) (b) The channel depth at 10 A.M. is feet. (Simplify your answer.)

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