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11.

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.

2.6%; increase

3%; decrease

3.4%; decrease

3%; increase

1 answer

To find the percent change in altitude, you can use the following formula:

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

In this case, the old value (initial altitude) is 100 ft and the new value (final altitude) is 103 ft.

  1. Calculate the change in altitude: \[ \text{Change} = 103 - 100 = 3 \text{ ft} \]

  2. Calculate the percent change: \[ \text{Percent Change} = \left(\frac{3}{100}\right) \times 100 = 3% \]

Since the altitude increased from 100 ft to 103 ft, we describe this as an increase.

Thus, the answer is:

3%; increase