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13a
Problem

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Textbook Expert
Textbook ExpertVerified Tutor
28 Oct 2021

Given information

Note that given the rate changes in radius,

 

Step-by-step explanation

Step 1.

(i) Note that the equation that area of the circle is .

Let the average rate of change of the area is .

Then, , where is the final area and is the initial area.

         

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