(a) If A is the area of a circle with radius r and the circle expands as time passes, find da/dt in terms of dr/dt. dA dr dt dt (b) Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a constant rate of 1 m/s, how fast is the area of the spill increasing when the radius is 22 m? m2/s

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section: Chapter Questions
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(a) If A is the area of a circle with radius r and the circle expands as time passes,
find da/dt in terms of dr/dt.
dA
dr
%3D
dt
dt
(b) Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the
radius of the oil spill increases at a constant rate of 1 m/s, how fast is the area of
the spill increasing when the radius is 22 m?
m2/s
Transcribed Image Text:(a) If A is the area of a circle with radius r and the circle expands as time passes, find da/dt in terms of dr/dt. dA dr %3D dt dt (b) Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a constant rate of 1 m/s, how fast is the area of the spill increasing when the radius is 22 m? m2/s
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