The depth of water,y in feet of water in Boston harbor is given in terms of t the number of hours since midnight by y=5+4.9cos(πt/6).Calculate the water depth at 2:00pm and also calculate the rate at which the water depth is changing at that time.

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- Nov 19th 2009, 09:53 AMmathcalculushelpcalculate water depth rate..
The depth of water,y in feet of water in Boston harbor is given in terms of t the number of hours since midnight by y=5+4.9cos(πt/6).Calculate the water depth at 2:00pm and also calculate the rate at which the water depth is changing at that time.

- Nov 19th 2009, 10:26 AMLight