Rates of change

(* Ignore this section* - wk 6, 8E Q12) )

Please answer the questions on the attachment below. ( ON PAPER/WRITTEN ) ( KEEP WORKING OUT AND EXPLANATION SEPERATE)

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Given:

Working solution

Answer:)

12 The height of water (in metres) at the entrance to a bay 3 hours after high tide is: H = 10 + 2 cos 1% Find: a the rate of change of H at any time, t b the rate of change of H: i 6 hours ii 15 hours iii 20 hours after high tide c the minimum and maximum value of H and the time _ when they rst occur after the initial high tide. a jam