At 3:00 AM, the temperature was 13°C below zero, but by noon it had risen to 32°C. Therefore, the average hourly increase in temperature was ______?

At 3:00 AM, the temperature was 13°C below zero, but by noon it had risen to 32°C. Therefore, the average hourly increase in temperature was ______?

Explanation

Initial temperature = -13°C

Final temperature = 32°C

Total temperature rise = 32 - (-13)

= 32 + 13

= 45°C

Time elapsed = 9 hours (from 3:00 AM to noon)

Average hourly increase = Total temperature rise / Time elapsed

= 45°C / 9 hours

= 5°C/hour