Answer:
20.4°C
Explanation:
Initial temperature 't1'= -4.8°C
Final temperature 't2'= 15.6°C
In order to find change in temperature, take the difference of above two temperatures. So,
Change in temperature 'ΔT' = t2 - t1
ΔT= 15.6 - (-4.8)
ΔT= 20.4 °C
Therefore, the change in temperature was 20.4°C