The situation that involves a change modeled by a positive number but an end result modeled by a negative number is:
April owes her brother $5. On Friday, she gets $10 for her allowance.
In this case, the positive change is represented by the $10 allowance she receives. However, since she owes $5, the end result, after applying her allowance, would still leave her with a net of $5 (receiving $10 but having to give $5 to her brother). If it were presented in another context, like if she owed instead of received, it could potentially yield a negative balance in debt.
But directly comparing each scenario:
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Leo's situation: He changes floors by going down 4 (a negative movement), so the result reflects downward movement numerically as well (-2 to -2 - 4 = -2).
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The airplane: descends from 300 feet to 250 feet (also a positive change in altitude reflecting downward movement).
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Irene's case: swims from -30 feet to -20 feet (a positive change of 10 feet toward the surface but the result is still negative).
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April's case: where the positive allowance of $10 could leave her in a positive cash situation once the debt is considered.
Based on the question premise specifically looking for a change that was a positive addition to an initially negative result, Irene's diving situation is specifically correct.
Final Answer: Irene is scuba diving at –30 feet. She swims 10 feet toward the surface to watch a school of fish.
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