(a) If is the area of a circle with radius and the circle expands as time passes, find
Chapter 3, Problem 2(choose chapter or problem)
(a) If is the area of a circle with radius and the circle expands as time passes, find in terms of . (b) Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a constant rate of , how fast is the area of the spill increasing when the radius is 30 m?
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