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An oil slick is expanding as a circle. The radius of the circle is increasing at the rate of 19 meters per day. Express the area of the circle as a function of dd, the number of…

An oil slick is expanding as a circle. The radius of the circle is increasing at the rate of 19 meters per day. Express the area of the circle as a function of dd, the number of…
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An oil slick is expanding as a circle. The radius of the circle is increasing at the rate of 19 meters per day. Express the area of the circle as a function of dd, the number of days elapsed.

A(d)=?

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User Carl Dong
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1 Answer

6 votes
Area of a circle = pi*r^2

Radius of circle = 19*number of days elapsed = 19d

Therefore: A(d) = pi*(19d)^2
answered
User Bastaspast
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8.2k points
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