The speed, v, of a wave is inversely proportional to the square root of the depth, d, of the water. When v= 30 then d = 400.
Find y when d=25.

v = 120

Step-by-step explanation:

If v is inversely proportional to square root of d, then we can write

= k    

If v  = 30 and d = 400, then

30() = k

k = 30(20) = 600

Now = 600

If d = 25, then v = 600

                         5v = 600

                            v = 120

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step-by-step explanation:

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