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# Consider the situation in Exercise 51 if the cost of laying pipe under the river is

ISBN: 9781305270336 484

## Solution for problem 66 Chapter 4.7

Single Variable Calculus: Early Transcendentals | 8th Edition

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Problem 66

Consider the situation in Exercise 51 if the cost of laying pipe under the river is considerably higher than the cost of laying pipe over land (\$400,000ykm). You may suspect that in some instances, the minimum distance possible under the river should be used, and P should be located 6 km from the refinery, directly across from the storage tanks. Show that this is never the case, no matter what the under river cost is.

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CHAPTER 14 PUBLIC RELATIONS: Defining public relations:  Advertising and PR are attempts at persuasions and use mass media. PR is management functions but advertisement is marketing function.  PR is not involved in interpersonal communications.  Advertisement is sponsored but PR messages appear as features, news stories or editorials and space and time isn’t paid for.  Publicity- (different than PR!)- the placing of stories in the mass media. A firm can have extensive publicity but bad public relations. Publicity is one way and PR is two-way communication.  PUBLIC RELATIONS:  Evolves working with public opinion. They attempt to influence public opinion in a way that is positive to the client.

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Consider the situation in Exercise 51 if the cost of laying pipe under the river is