A student investigated how sweating helps humans to cool down. They wrapped one beaker (Beaker A) in a damp paper sleeve and another beaker (Beaker B) in a dry paper sleeve. They filled both beakers with hot water and recorded the temperatures over 10 minutes, as shown in the table.
| Time in minutes | Beaker A (damp sleeve) temperature in °C | Beaker B (dry sleeve) temperature in °C |
|---|---|---|
| 1 | 95 | 95 |
| 2 | 82 | 90 |
| 3 | 71 | 85 |
| 4 | 62 | 80 |
| 5 | 53 | 75 |
| 6 | 45 | 70 |
| 7 | 37 | 65 |
| 8 | 29 | 60 |
| 9 | 23 | 55 |
| 10 | 20 | 50 |
Calculate the rate of temperature change in Beaker A from 1 to 9 minutes.
