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1.4 Units & Conversions

1.4 Units & Conversions
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  • Math Help

    Be sure you understand the unit analysis rules on page 34. Here is an example.

    Consider a rectangle that is 3 feet high and 4 feet wide.

    • The perimeter of the rectangle is

      3 ft + 4 ft + 3 ft + 4 ft = 14 ft : Addition preserves units
    • The area of the rectangle is

      (4 ft) times (3 ft) = 12 ft squared : Multiplication changes units
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  • Checkpoint Solution

    Notice how writing the units helps keep track of the calculations.

    See that "weeks" and "hours" cancel out and you are left with "dollars."

    Although the result may seem unreasonable, you can check the history of some famous cases to see that litigation bills can run up to several million dollars.

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    Ron Larson (author)7 years ago |
    Throughout this book, you are welcome to print the PDF pages for personal use. Please notice, however, that the pages are copyrighted.
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