The radius of a circle is increasing at a constant rate of 7 ft/sec. Express the rate at which the area of the circle is changing in terms of the circumfer- ence, C of the circle. 1. rate = 2. rate = 3. rate = 7C sq. ft./sec 7 C sq. ft./sec 7TC sq. ft./sec

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
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The radius of a circle is increasing at a
constant rate of 7 ft/sec.
Express the rate at which the area of the
circle is changing in terms of the circumfer-
ence, C of the circle.
1. rate= 7C sq. ft./sec
2. rate =
3. rate =
4. rate =
5. rate =
6. rate =
7
C sq.
C
sq. ft./sec
7TC sq. ft./sec
14TC sq. ft./sec
7
TC sq. ft./sec
14 C sq. ft./sec
Transcribed Image Text:The radius of a circle is increasing at a constant rate of 7 ft/sec. Express the rate at which the area of the circle is changing in terms of the circumfer- ence, C of the circle. 1. rate= 7C sq. ft./sec 2. rate = 3. rate = 4. rate = 5. rate = 6. rate = 7 C sq. C sq. ft./sec 7TC sq. ft./sec 14TC sq. ft./sec 7 TC sq. ft./sec 14 C sq. ft./sec
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