Let's analyze each situation to determine if it involves a change modeled by a positive number but results in a negative number:
A. Leo enters an elevator in the second floor and goes down four floors.
- Change: Going down is a negative change (moving down), and the starting point is positive (2nd floor). Result: 2 - 4 = -2 (negative). This fits the criteria.
B. Plane flying at an altitude of 300 feet descends 50 feet.
- Change: Descending (negative change) from 300 feet. Result: 300 - 50 = 250 (positive). This does not fit the criteria.
C. Irene is scuba diving at -30 feet; she swims 10 feet toward the surface to watch a school of fish.
- Change: Swimming up is a positive change. Result: -30 + 10 = -20 (still negative). This does not fit the criteria.
D. April owes her brother $5.00 on Friday; she gets $10.00 for her allowance.
- Change: Getting allowance is a positive change. Result: -5 + 10 = 5 (positive). This does not fit the criteria.
Based on the analysis, Option A is the situation that involves a change modeled by a positive number (in terms of moving down) but results in a negative number (ending up on the -2 floor).
1 answer