Consider the conversion facts 1 inch = 2.54 centimeters and 1 centimeter ≈ 0.39 inch. a. Write an expression for the exact number of inches in 1 centimeter.

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Question 2
b. Use a calculator to evaluate your expression in part (a). Round to the nearest ten thousandths if necessary.

1 cm ≈
in.

Question 3
Explain why measurement conversions may be slightly different when converting between metric units and U. S. customary units using the conversion facts in the back of the book.