The compound inequality that represents the range in which the antifreeze is efficient is:
-22F ≤ T ≤ 266F
First, we know that the antifreeze is efficient on the range between -30°C and 130°C.
Also remember that the formula to change units from Celsius to Fahrenheit is:
F = (C*9/5) + 32
Where C is the temperature in Celsius.
Then the lower limit is:
F = (-30*9/5) + 32 = -22F
The upper limit is:
F = (130*9/5) + 32 = 266F
Then the antifreeze is efficient in the range between -22F and 266F
, then the compound inequality that represents this is:
-22F ≤ T ≤ 266F
If you want to learn more about compound inequalities:
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