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A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate of 5 ft/sec, at what speed is the area of the ripple increasing when its radius is 2 feet? 1. speed = 21sq. ft/sec 2. speed = 19sq. ft/sec 3. speed = 22sq. ft/sec 4. speed = 20sq. ft/sec 5. speed = 23sq. ft/sec 6. speed = 197sq. ft/sec 7. speed = 22sq. ft/sec 8. speed = 20лsq. ft/sec

A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate of 5 ft/sec, at what speed is the area of the ripple increasing when its radius is 2 feet? 1. speed = 21sq. ft/sec 2. speed = 19sq. ft/sec 3. speed = 22sq. ft/sec 4. speed = 20sq. ft/sec 5. speed = 23sq. ft/sec 6. speed = 197sq. ft/sec 7. speed = 22sq. ft/sec 8. speed = 20лsq. ft/sec

Algebra: Structure And Method, Book 1
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter11: Rational And Irrational Numbers
Section11.5: Square Roots Of Variable Expressions
Problem 9P
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A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate of 5 ft/sec, at what speed is the area of the ripple increasing when its radius is 2 feet? 1. speed: 2. speed = = 21лsq. ft/sec = 3. speed: = = 19sq. ft/sec 4. speed: 20sq. ft/se 5. speed = 23sq. ft/sec 6. speed 197sq. ft/sec 7. speed = 227sq. ft/sec - 8. speed = 20лsq. ft/sec = 22sq. ft/sec
Transcribed Image Text:A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate of 5 ft/sec, at what speed is the area of the ripple increasing when its radius is 2 feet? 1. speed: 2. speed = = 21лsq. ft/sec = 3. speed: = = 19sq. ft/sec 4. speed: 20sq. ft/se 5. speed = 23sq. ft/sec 6. speed 197sq. ft/sec 7. speed = 227sq. ft/sec - 8. speed = 20лsq. ft/sec = 22sq. ft/sec
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