15th Edition

ISBN: 9781260014228

Author: sobecki

Publisher: MCG

Concept explainers

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 2.7, Problem 3C

When an average-sized person walks at a fairly brisk pace, he or she can burn about 100 calories in one mile. A standard weight-loss rule of thumb is that you need to burn 3,500 calories to lose 1 pound of body fat. How many miles would you have to walk per day to lose one pound in one week?

Step 1: Understand the problem. Write down the relevant information provided in the problem.

a. How many calories are burned per mile?

b. How many calories do we need to burn in a week?

Identify what we’re asked to find.

c. What exactly did the problem ask us to find?

Step 2: Devise a plan. Since we know that we need to burn 3,500 calories in a week, we can calculate how many we need to burn in one day. Then we can use that amount to figure out how many miles we’d need to walk (given that we burn 100 calories per mile).

Step 3: Carry out the plan.

d. At 3,500 calories per week, how many would we need to burn in one day?

e. At 100 calories per mile, how many miles would we need to cover to burn the number of calories found in part d?

Step 4: Check the answer.

f. With the number of miles you found in part e, how many calories would we burn in one day? In one week? Have you solved the problem correctly?

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Chapter 2.7, Problem 2C

Chapter 2.7, Problem 1G

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Chapter 2 Solutions

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Solution Summary: The author explains that an average sized person can burn 100 calories in one mile and a standard weight-loss rule of thumb is that they need to lose 1 pound of body fat.

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Chapter 2 Solutions