Question

1. the outside temperature at 4:00 p.m. was 8 degrees celsius. the temperature decreased 2.5°c each hour until 10:00 p.m. what was the temperature at 10:00 p.m.?

Explanation:

Step1: Calculate time - interval

The time from 4:00 PM to 10:00 PM is $10 - 4=6$ hours.

Step2: Calculate total temperature decrease

The temperature decreases 2.5°C per hour. So in 6 hours, the total decrease is $2.5\times6 = 15$°C.

Step3: Calculate final temperature

The initial temperature was 8°C. The final temperature $T$ is $T=8 - 15=- 7$°C.

Answer:

-7°C