Which statement below describes the greatest absolute value change?
Understand the Problem
The question is asking which statement describes the greatest absolute value change among several scenarios involving changes in height, temperature, weight, and bank balance. To solve this, we would calculate the absolute changes in each case and compare them.
Answer
The greatest absolute value change is \( 129.25 \) dollars.
Answer for screen readers
The greatest absolute value change is in the bank balance, changing by ( 129.25 ) dollars.
Steps to Solve
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Calculate the Absolute Change in Height The height changes from ( 8\frac{1}{4} ) to ( 30\frac{3}{8} ). Convert mixed numbers to improper fractions: [ 8\frac{1}{4} = \frac{33}{4} \quad \text{and} \quad 30\frac{3}{8} = \frac{243}{8} ] To compare, convert to a common denominator (which is 8): [ \frac{33}{4} = \frac{66}{8} ] Now calculate the absolute change: [ \left| \frac{243}{8} - \frac{66}{8} \right| = \left| \frac{243 - 66}{8} \right| = \left| \frac{177}{8} \right| = 22.125 \text{ inches} ]
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Calculate the Absolute Change in Temperature The temperature changes from ( -12\frac{1}{2} ) to ( 40\frac{4}{4} ). Convert mixed numbers: [ -12\frac{1}{2} = -\frac{25}{2} \quad \text{and} \quad 40\frac{4}{4} = 40 ] Convert 40 to a fraction: [ 40 = \frac{80}{2} ] Now calculate the absolute change: [ \left| \frac{80}{2} - \left(-\frac{25}{2}\right) \right| = \left| \frac{80 + 25}{2} \right| = \left| \frac{105}{2} \right| = 52.5 \text{ degrees} ]
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Calculate the Absolute Change in Weight The weight changes from ( 27\frac{1}{8} ) to ( 112\frac{3}{4} ). Convert mixed numbers: [ 27\frac{1}{8} = \frac{217}{8} \quad \text{and} \quad 112\frac{3}{4} = \frac{451}{4} ] Convert to a common denominator (which is 8): [ \frac{451}{4} = \frac{902}{8} ] Now calculate the absolute change: [ \left| \frac{902}{8} - \frac{217}{8} \right| = \left| \frac{902 - 217}{8} \right| = \left| \frac{685}{8} \right| = 85.625 \text{ pounds} ]
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Calculate the Absolute Change in Bank Balance The balance changes from (-20.50) to (108.75). Convert to fractions: [ -20.50 = -\frac{41}{2} \quad \text{and} \quad 108.75 = \frac{435}{4} ] Convert to a common denominator (which is 4): [ -\frac{41}{2} = -\frac{82}{4} ] Now calculate the absolute change: [ \left| \frac{435}{4} - \left(-\frac{82}{4}\right) \right| = \left| \frac{435 + 82}{4} \right| = \left| \frac{517}{4} \right| = 129.25 \text{ dollars} ]
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Compare the Absolute Changes The absolute changes calculated are:
- Height: ( 22.125 ) inches
- Temperature: ( 52.5 ) degrees
- Weight: ( 85.625 ) pounds
- Bank Balance: ( 129.25 ) dollars
The greatest absolute change is in the bank balance.
The greatest absolute value change is in the bank balance, changing by ( 129.25 ) dollars.
More Information
This problem compares changes in various contexts (height, temperature, weight, and bank balance) to identify which change is the largest. Absolute values help us measure how much a quantity has changed without worrying about direction (increase or decrease).
Tips
- Not Converting to a Common Denominator: When comparing fractions, it's crucial to convert them to a common denominator to ensure accurate comparisons.
- Misinterpreting Absolute Values: Remember that absolute value measures distance from zero, so always take the positive difference when calculated changes.
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