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  3. an oil slick is expanding as a circle. the radius

An oil slick is expanding as a circle. The radius of the circle is initially...

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Basic Math

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An oil slick is expanding as a circle. The radius of the circle is initially 2 meters and increases at the rate of 20 meters per day. Express the area of the circle as a function of t, the number of days elapsed. The area of a circle is A(r) = ?r.(Type "pi" for the symbol ?.)

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