14th Edition

ISBN: 9780135961438

Author: Barnett

Publisher: PEARSON CO

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 5.3, Problem 91E

Archaeology. A skull found in an ancient tomb has 8% of the original amount of radioactive carbon-14 present. Estimate the age of the skull. (See Example 3.)

EXAMPLE 3 Archaeology A human bone fragment was found at an archaeological site in Africa. If 10% of the original amount of radioactive carbon-14 was present, estimate the age of the bone (to the nearest 100 years).

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Chapter 5.3, Problem 90E

Chapter 5.3, Problem 92E

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Solution Summary: The author calculates the age of a skull if 8% of the original amount of radioactive carbon-14 is present in the skull.

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