Question

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

Answer 1

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**