Contemporary Mathematics for Business & Consumers

8th Edition

ISBN: 9781305585447

Author: Robert Brechner, Geroge Bergeman

Publisher: Cengage Learning

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 …

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experime…

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Textbook Question

Chapter 18.I, Problem 1TIE

Use Exhibit 18-1 to determine the amount of sales tax on a calculator at Office Depot with a retail price of $12.49.

Chapter 18.I, Problem 1TIE, Use Exhibit 18-1 to determine the amount of sales tax on a calculator at Office Depot with a retail

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Chapter 17, Problem 15AT

Chapter 18.I, Problem 2TIE

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Determine whether each function is an injection and determine whether each is a surjection.The notation Z_(n) refers to the set {0,1,2,...,n-1}. For example, Z_(4)={0,1,2,3}. f: Z_(6) -> Z_(6) defined by f(x)=x^(2)+4(mod6). g: Z_(5) -> Z_(5) defined by g(x)=x^(2)-11(mod5). h: Z*Z -> Z defined by h(x,y)=x+2y. j: R-{3} -> R defined by j(x)=(4x)/(x-3).

Determine whether each function is an injection and determine whether each is a surjection.

Let A = {a, b, c, d}, B = {a,b,c}, and C = {s, t, u,v}. Draw an arrow diagram of a function for each of the following descriptions. If no such function exists, briefly explain why. (a) A function f : AC whose range is the set C. (b) A function g: BC whose range is the set C. (c) A function g: BC that is injective. (d) A function j : A → C that is not bijective.

Chapter 18 Solutions

Contemporary Mathematics for Business & Consumers

Ch. 18.I - Use Exhibit 18-1 to determine the amount of sales...Ch. 18.I - Andy Bennett purchased a car for $38,600 at Auto...Ch. 18.I - At the end of a business day, the cash register at...Ch. 18.I - An archery set at The Sports Authority in Mason,...Ch. 18.I - Use Exhibit 18-1 to determine the sales tax and...Ch. 18.I - Use Exhibit 18-1 to determine the sales tax and...Ch. 18.I - Use Exhibit 18-1 to determine the sales tax and...Ch. 18.I - Use Exhibit 18-1 to determine the sales tax and...Ch. 18.I - Use Exhibit 18-1 to determine the sales tax and...Ch. 18.I - Use Exhibit 18-1 to determine the sales tax and...

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Use Exhibit 18-1 to determine the amount of sales tax on a calculator at Office Depot with a retail price of $12.49.

Solution Summary: The author explains how to calculate the sales tax of Office Depot's calculator when the price of calculator is 12.49.

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Chapter 18 Solutions