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The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 34 cm when the weight is 3 kg, what is the distance when the weight is 9 kg?
22. Find the variation constant and an equation of variation where y varies inversely as x and y=1 when x=9.
23. It takes 6 hr for 4 cooks to prepare the food for a wedding rehearsal dinner. How long will it take 2 cooks to prepare the dinner? A. What kind of variation applies to this situation? B. Solve the problem.

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