To find Andy's average change in elevation in feet per minute, we need to calculate the rate of descent over the time period he spent descending.
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Calculate the average change in elevation:
- Andy descends 10.5 feet in 2.5 minutes.
- Average change in elevation = Total descent / Total time = 10.5 feet / 2.5 minutes
\[ \text{Average change in elevation} = \frac{10.5 \text{ feet}}{2.5 \text{ minutes}} = 4.2 \text{ feet per minute} \]
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Determine the total descent after 6.5 minutes:
- If Andy continues at the same rate, we can find out how far he descends in 6.5 minutes:
- Total descent = Average change in elevation × Time
- Total descent in 6.5 minutes = 4.2 feet/minute × 6.5 minutes
\[ \text{Total descent} = 4.2 \times 6.5 = 27.3 \text{ feet} \]
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Determine his position in relation to sea level:
- Since Andy starts at sea level and only descends, after 6.5 minutes he will be 27.3 feet below sea level.
Thus, Andy's position in relation to sea level after 6.5 minutes is 27.3 feet below sea level.
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