To determine which city is warmer after 5 hours and the difference in their temperatures, we can calculate the temperatures of both City A and City B after 5 hours.
City A:
- Initial temperature: 70°F
- Rate of change: -5°F per hour
- Change in temperature after 5 hours: \( -5°F \times 5 , \text{hours} = -25°F \)
- Temperature after 5 hours: \( 70°F - 25°F = 45°F \)
City B:
- Initial temperature: 70°F
- Rate of change: -3°F per hour
- Change in temperature after 5 hours: \( -3°F \times 5 , \text{hours} = -15°F \)
- Temperature after 5 hours: \( 70°F - 15°F = 55°F \)
Now, comparing the two temperatures after 5 hours:
- City A: 45°F
- City B: 55°F
City B is warmer. To find the difference in temperatures:
- Difference: \( 55°F - 45°F = 10°F \)
So, the final answer is: City B is warmer by 10°F.