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4.1 Related Rates OPEN ITEMS INFO LEARNING RESOURCES CONCEPT REVIEW 16. Help me with this # 1 Let I be the length of a diagonal of a rectangle whose sides have lengths a and y, and assume that a and y vary with time. If x increases at a constant rate of - ft/s and y decreases at a constant rate of - ft/s, how fast is the size of the diagonal changing when a - 4 ft. and y - 7 ft? Answer: Submit