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18-19. In xy = 4, let x and y be differentiable functions of t. Evaluate at x = 10 and = 20. dt dy Find A) 5 25 B) C) D) 25 20-21. If the radius is increasing at 0.1 m/s, how fast is the area of a circular oil spill increasing when its radius is 50 m? A) 10z m/s В) 10л т?/s C) 5n m/s D) 5n m2/s m

18-19. In xy = 4, let x and y be differentiable functions of t. Evaluate at x = 10 and = 20. dt dy Find A) 5 25 B) C) D) 25 20-21. If the radius is increasing at 0.1 m/s, how fast is the area of a circular oil spill increasing when its radius is 50 m? A) 10z m/s В) 10л т?/s C) 5n m/s D) 5n m2/s m

Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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18-19. In xy = 4 , let x and y be differentiable dx functions of t. Evaluate at x = 10 and = 20. dt dy Find- A) 5 B) D) 25 20-21. If the radius is increasing at 0.1 m/s, how fast is the area of a circular oil spill increasing when its radius is 50 m? A) 10n m/s B) 10m m²/s C) 5n m/s D) 5n m² /s
Transcribed Image Text:18-19. In xy = 4 , let x and y be differentiable dx functions of t. Evaluate at x = 10 and = 20. dt dy Find- A) 5 B) D) 25 20-21. If the radius is increasing at 0.1 m/s, how fast is the area of a circular oil spill increasing when its radius is 50 m? A) 10n m/s B) 10m m²/s C) 5n m/s D) 5n m² /s
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