The Area of a Circular Sun Spot Is Growing at a Rate

question 66

Multiple Choice

The area of a circular sun spot is growing at a rate of $600 \frac { \mathrm { km } ^ { 2 } } { \mathrm {~s} }$ . How fast is the radius growing at the instant when it equals 5,000 km Round your answer to three decimal places.

• A) \(\frac { \mathrm { km } } { \mathrm { s } }\)
• B) \(0.019 \frac { \mathrm { km } } { \mathrm { s } }\)
• C) \(0.038 \frac { \mathrm { km } } { \mathrm { s } }\)
• D) \(8.333 \frac { \mathrm { km } } { \mathrm { s } }\)
• E) \(0.060 \frac { \mathrm { km } } { \mathrm { s } }\)

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