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4. Let s(t) = -5² + 40t be the position equation for a rock thrown upwards. At what time t, in seconds, will the rock change directions? a. 8 s b. 4 s c. Os d. 8.195 s

4. Let s(t) = -5² + 40t be the position equation for a rock thrown upwards. At what time t, in seconds, will the rock change directions? a. 8 s b. 4 s c. Os d. 8.195 s

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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4. Let s(t) = -5² + 40t be the position equation for a rock thrown upwards. At what time t, in seconds, will the rock change directions? a. b. 8 s 4 s c. d. O s 8.195 s
Transcribed Image Text:4. Let s(t) = -5² + 40t be the position equation for a rock thrown upwards. At what time t, in seconds, will the rock change directions? a. b. 8 s 4 s c. d. O s 8.195 s
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