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Absolute Value Inequality Word Expressions

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This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

How to derive the absolute value inequality from a word expression?
In manufacturing a 25 lb. disc weight, the allowed error in weight must be less than 0.1 lb. Express the range of the allowed weight in lb. for this disc using the absolute value.
2. Express the interval 1.5 < x < 4.5
4. For a certain ride at an amusement park, the rider's height is restricted to be between 42 and 66 inches. Express this height restriction in inches using the absolute value inequality.
5. The body mass index (BMI) measures the body fat based on a person's height and weight. According to National Heart Lung and Blood Institute, the BMI for the normal weight is between 18.5 and 24.9. Express this range using the absolute value inequality.
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