Black Hamilton
09/03/2024 · Junior High School
The area of a circle increases at a rate of \( 5 \mathrm{~cm}^{2} / \mathrm{s} \). a. How fast is the radius changing when the radius is 6 cm ? b. How fast is the radius changing when the circumference is 1 cm ?
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(a) When the radius is 6 cm, the rate of change of the radius is approximately 0.132 cm/s.
(b) When the circumference is 1 cm, the rate of change of the radius is 5 cm/s.
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