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The label on the car's antifreeze container claims to protect the car between −40°C and 125°C. To convert Celsius temperature to Fahrenheit temperature, the formula is C = (F − 32). Write and solve the inequality to determine the Fahrenheit temperature range at which this antifreeze protects the car.

The label on the cars antifreeze container claims to protect the car between 40C and 125C To convert Celsius temperature to Fahrenheit temperature the formula i class=

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merlynthewhizz
The condition 'temperature between -40°C and 125°C' can be written as inequality -40°C ∠ x°C < 125°C

Formula of changing degree Celcius to degree to degree Fahrenheit is given
°C = 5/9 (°F - 32)
Rearranging to make °F the subject

°F = [tex] \frac{9}{5}C+32 [/tex]

Substitute °C = -40
°F = [tex] \frac{9}{5}(-40)+32 = -40 [/tex]

Substitute °C = 125
°F = [tex] \frac{9}{5}(125)+32 = 257 [/tex]

Substitute °F = -40 and °F = 257 into the inequality 

-40°C < x°C < 125°C
-40°F < F < 257°F

Correct answer: B

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