A cake recipe says to bake the cake until the center is 180 degrees, then let the cake until the cool to 120 degrees. Given the room temperature of 70 degrees, how long does it take to cool to the desired temperature?
| TIME (min) | TEMP(F) |
| 0 | 180 |
| 5 | 126 |
| 10 | 94 |
| 15 | 80 |
| 20 | 73 |
