1. The radius of a circle is increasing at the rate of 3.4 cm/sec. Initially, the radius has a length of 22cm. Determine the rate the area is changing after 26 seconds.  instead of using a circle please use other shapes and please answer the question you have made to it will help me a lot.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Hello can you help me review

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The radius of a circle is increasing at the rate of 3.4 cm/sec. Initially, the radius has a length of 22cm. Determine the rate the area is changing after 26 seconds. 

instead of using a circle please use other shapes and please answer the question you have made to it will help me a lot. thank you

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Hello, one last question are there instances where they use triangle?thank you so much

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What if its a rectangle are there instance like that?

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