Answer:
t < 0 and t > 140
Explanation:
It is given in the question that fluid is not a liquid if its temperature is above 140°C or below 0°C.
So, the inequality that satisfies the temperature at which the fluid is liquid will be given by 140 ≥ t ≥ 0.
Now, the compound inequality for the temperature t when the fluid is not liquid is t < 0 and t > 140. (Answer)