Thomas David A. Books

The math-computer connection

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Explains how to write fundamental programs using the computer language BASIC to solve math problems, use mathematical formulas, generate tables, and make calculations.

Math projects in the computer age

By Thomas David A.

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Active geometry

By Thomas David A.

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Utah civil procedure

By Thomas David A.

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Thompson on Real Property

By Thomas David A., David A. Thomas

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Math projects for young scientists

By Thomas David A.

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Suggests topics and tips on preparing a project or original research in pure mathematics for a science fair. Discusses such areas as probability, geometry, topology, number theory, and sequences.

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.