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4.

Find the percent of change in altitude if a weather balloon moves from 100 ft to 103 ft. Describe the percent of change as an increase or decrease. Round to the nearest tenth if necessary.

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To find the percent of change in altitude when the weather balloon moves from 100 ft to 103 ft, you can use the formula for percent change:

\[ \text{Percent Change} = \left( \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \right) \times 100 \]

In this case:

  • Old Value = 100 ft
  • New Value = 103 ft

Now, substitute the values into the formula:

\[ \text{Percent Change} = \left( \frac{103 - 100}{100} \right) \times 100 \] \[ = \left( \frac{3}{100} \right) \times 100 \] \[ = 3% \]

The percent of change is an increase of 3%.