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The speed of a wave is given by s = 3.1d, where s is the speed, in meters per second, and d is the depth

The speed of a wave is given by s = 3.1d, where s is the speed, in meters per second, and d is the depth of the water, in meters. (a) Find the rate of change of s with respect to d. (b) What is the speed of a wave when the depth of the water is 10 m?

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