N E Suppose a police officer is 1/2 mile south of an intersection, driving north towards the intersection at 30 mph. At the same time, another car is 1/2 mile east of the intersection, driving east (away from the intersection) at an unknown speed. The officer's radar gun indicates 15 mph when pointed at the other car (that is, the straight-line distance between the officer and the other car is increasing at a rate of 15 mph). What is the speed of the other car? Speed = 51.2 mph. Now suppose that the officer's radar gun indicates -15 mph instead (that is, the straight-line distance is decreasing at a rate of 15 mph). What is the speed of the other car this time? Speed = | mph.

N E Suppose a police officer is 1/2 mile south of an intersection, driving north towards the intersection at 30 mph. At the same time, another car is 1/2 mile east of the intersection, driving east (away from the intersection) at an unknown speed. The officer's radar gun indicates 15 mph when pointed at the other car (that is, the straight-line distance between the officer and the other car is increasing at a rate of 15 mph). What is the speed of the other car? Speed = 51.2 mph. Now suppose that the officer's radar gun indicates -15 mph instead (that is, the straight-line distance is decreasing at a rate of 15 mph). What is the speed of the other car this time? Speed = | mph.

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter2: Equations And Inequalities

Section2.7: More On Inequalities

Problem 44E

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