Final answer:
The range for the actual temperature when the thermometer reads 28 degrees with an uncertainty of ±1.2 degrees is between 26.8°C and 29.2°C.
Step-by-step explanation:
If a thermometer is guaranteed to give a temperature reading with an uncertainty of no more than ±1.2 degrees from the actual temperature, and it reads 28 degrees, we can calculate the range for the actual temperature. To find this range, we subtract 1.2 degrees from the reading to find the lower limit and add 1.2 degrees to the reading to find the upper limit.
Lower Limit: 28 - 1.2 = 26.8°C
Upper Limit: 28 + 1.2 = 29.2°C
Therefore, the range for the actual temperature is between 26.8°C and 29.2°C. This range of possible temperatures takes into account the uncertainty of the thermometer's reading.