y rides a train along a straight north-south track. His position at timet in hour is s(t) = (–t¹ – 2t² - 4t+20) km north of Montre ge velocity between time t = 1 and t = 10 hour is

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.3: Lines
Problem 43E
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Anthony rides a train along a straight north-south track. His position at time t in hour is
s(t) = (-t¹ – 2t² - 4t+20) km north of Montreal
(a) His average velocity between time t = 1 and t = 10 hour is
(b) His instantaneous velocity at time t = 7 is
(c) In what direction is Anthony moving at time t =
A. North
B. East
C. South
D. West
E. Not moving at all
7 hour?
Transcribed Image Text:Anthony rides a train along a straight north-south track. His position at time t in hour is s(t) = (-t¹ – 2t² - 4t+20) km north of Montreal (a) His average velocity between time t = 1 and t = 10 hour is (b) His instantaneous velocity at time t = 7 is (c) In what direction is Anthony moving at time t = A. North B. East C. South D. West E. Not moving at all 7 hour?
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