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A circular oil slick is expanding with radius, r in feet, at time t in...

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Calculus

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A circular oil slick is expanding with radius, r in feet, at time t in hours given by r = 12t - 0.3t^2, for t in hours, 0 ? t ? 10.Find a formula for A = f(t), the area of the oil slick as a function of time.The formula for the area of a circle is A = ?rA = f(t) = Be sure to include units!

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