Ethan is sitting on the edge of a dock tossing rocks into the water. As each rock hits the water, small circles appear traveling outward from the point of impact. The radius of the circle is changing at a rate of 5 in/sec. How fast is the area of the outer circle changing when the diameter is 8 in? * 20n in/sec 80n in/sec 40π in/sec 60n in/sec

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Ethan is sitting on the edge of a dock tossing rocks into the water. As each
rock hits the water, small circles appear traveling outward from the point
of impact. The radius of the circle is changing at a rate of 5 in/sec. How
fast is the area of the outer circle changing when the diameter is 8 in? *
20n in/sec
80n in/sec
40m in/sec
60n in/sec
O O
Transcribed Image Text:Ethan is sitting on the edge of a dock tossing rocks into the water. As each rock hits the water, small circles appear traveling outward from the point of impact. The radius of the circle is changing at a rate of 5 in/sec. How fast is the area of the outer circle changing when the diameter is 8 in? * 20n in/sec 80n in/sec 40m in/sec 60n in/sec O O
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