1. A pebble is dropped in a calm pond causing ripples in the form of concentric circles. The radius r of the outer ripple is increasing at a constant rate of 0.5 feet per second. When the radius is 4 feet, at what rate is the total area A of the disturbed water changing?

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter21: Direct And Inverse Proportions
Section: Chapter Questions
Problem 7A: A plug gage tapers 3.10 mm along a 38.00 mm length, as shown in Figure 215. Set up a proportion and...
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1. A pebble is dropped in a calm pond causing ripples in the form of concentric
circles. The radius r of the outer ripple is increasing at a constant rate of 0.5
feet per second. When the radius is 4 feet, at what rate is the total area A of
the disturbed water changing?
Transcribed Image Text:1. A pebble is dropped in a calm pond causing ripples in the form of concentric circles. The radius r of the outer ripple is increasing at a constant rate of 0.5 feet per second. When the radius is 4 feet, at what rate is the total area A of the disturbed water changing?
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