19. A rock thrown into a still pond causes a circular ripple. If the radius of the ripple is increasing by 2 feet per second, how fast is the area changing when the radius is 10 feet? 20. Refer to Problem 19: How fast is the circumference of a circular ripple changing when the radius is 10 feet?

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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19. A rock thrown into a still pond causes a circular ripple. If the
radius of the ripple is increasing by 2 feet per second, how
fast is the area changing when the radius is 10 feet?
20. Refer to Problem 19. How fast is the circumference of a
circular ripple changing when the radius is 10 feet?
Transcribed Image Text:19. A rock thrown into a still pond causes a circular ripple. If the radius of the ripple is increasing by 2 feet per second, how fast is the area changing when the radius is 10 feet? 20. Refer to Problem 19. How fast is the circumference of a circular ripple changing when the radius is 10 feet?
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