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The area of a circular sunspot is growing at a rate of 500

style="color:rgb(0,0,0);"> km2/sec.

(a) How fast is the radius growing at the instant when it equals 3,000 kilometers? HINT [See Example 1.] (Round your answer to three decimal places.)


(b) How fast is the radius growing at the instant when the sunspot has an area of 250,000 square kilometers? HINT [Use the area formula to determine the radius at that instant.] (Round your answer to four decimal places.)


Screen Shot 2018-11-26 at 7.59.45 PM.png

Screen Shot 2018-11-26 at 7.59.45 PM.png

The area of a circular sunspot is growing at a rate of 500 km / sec
( 2 ) How fast is the radius growing at the instant when it equals 3 000 kilometers ? HI
IS ? HINT ( See Example 1 . I ( Round your answer to three decimal
places . )
km / s
( b ) How fast is the radius growing at the instant when the sunspot has an area of 250,000 square kilometers ? HI
IS ? HINT [Use the area formula to
determine the radius at that Instant . ] ( Round your answer to four decimal places . )
KM /s

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