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Identify the scenario that involves a change modeled by a positive number, but an end result modeled by a negative number.

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Irene is scuba diving 20 feet below sea level. Her sister tells her to swim 5 feet up towards the surface to see a school of fish.
Irene is scuba diving 20 feet below sea level. Her sister tells her to swim 5 feet up towards the surface to see a school of fish.

David is flying a plane at 2,350 feet. He then ascends 1,200 feet to avoid a storm cloud.
David is flying a plane at 2,350 feet. He then ascends 1,200 feet to avoid a storm cloud.

Margo is riding on a roller coaster. She starts at ground level and ascends 130 feet for the first hill. She then descends back to ground level.
Margo is riding on a roller coaster. She starts at ground level and ascends 130 feet for the first hill. She then descends back to ground level.

Anthony starts his dive in a boat 6 feet above sea level. He descends to see a shipwreck 234 feet below sea level.

3 answers

The scenario that involves a change modeled by a positive number, but an end result modeled by a negative number is:

Anthony starts his dive in a boat 6 feet above sea level. He descends to see a shipwreck 234 feet below sea level.

In this scenario, Anthony's descent is represented by a positive change, while the end result of being below sea level is represented by a negative number (since he is at -234 feet).

wrong

I apologize for the oversight. Let’s analyze the scenarios again to find the correct one that involves a change modeled by a positive number but results in a negative number.

  1. Irene is scuba diving 20 feet below sea level. Her sister tells her to swim 5 feet up towards the surface to see a school of fish.

    • Change: +5 feet (going up)
    • Result: 20 feet - 5 feet = 15 feet below sea level (still negative)

  2. David is flying a plane at 2,350 feet. He then ascends 1,200 feet to avoid a storm cloud.

    • Change: +1,200 feet (going up)
    • Result: 2,350 feet + 1,200 feet = 3,550 feet (positive)

  3. Margo is riding on a roller coaster. She starts at ground level and ascends 130 feet for the first hill. She then descends back to ground level.

    • Change: +130 feet (going up)
    • Result: 130 feet - 130 feet = 0 feet (neutral)

  4. Anthony starts his dive in a boat 6 feet above sea level. He descends to see a shipwreck 234 feet below sea level.

    • Change: -240 feet (the total change from 6 feet above to 234 feet below is a drop of 240 feet)
    • Result: -234 feet (negative)

Based on this analysis, the scenario with a positive change modeled but an end result that is negative is:

Irene is scuba diving 20 feet below sea level. Her sister tells her to swim 5 feet up towards the surface to see a school of fish.

Here, she swims upward (+5), but still ends up below sea level (15 feet below sea level, which is negative).

Thank you for your patience, and I appreciate your prompting for clarification!