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The Distance from the top of a cliff to the water below ranges from 13m(low tide) to 8m(high tide). Low tide occurs at 12:00 noon and it takes six hours between low tide and high tide.
a)Develop an equation representing the distance in terms of time
b) It is only safe to dive into the water when the distance is 10m or less, between what times is it safe to dive? round to the nearest minute

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