# How can a number line be used in real life?

A ruler?

A ruler is essentially a real world example of part of the Real number line, allowing you to estimate measurements.

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A number line can be used in real life for various purposes including:

- Measuring Distance or Length
- Representing Temperatures
- Tracking Financial Transactions
- Understanding Time Intervals
- Visualizing Data on a Scale
- Solving Real-World Math Problems

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you find the percent of increase or decrease given Original: 50 and New: 56?
- How do you evaluate #56546(\frac{8955}{8948}\div 4657\times 4659)#?
- How do you evaluate the following expression using decimals?: #4.56 - 4/5 + 3.21 + 17/32#
- How do you write two decimals that are equivalent to #2.50#?
- What is #987.2365 * 1000#?

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