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The Soap Bubble I Am Blowing Has a Radius That

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The soap bubble I am blowing has a radius that is growing at a rate of 9 cm/s. How fast is the surface area growing when the radius is 14 cm? (The surface area of a sphere of radius r is The soap bubble I am blowing has a radius that is growing at a rate of 9 cm/s. How fast is the surface area growing when the radius is 14 cm? (The surface area of a sphere of radius r is   .)  A)    B)    C)    D)    E)   .)


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