Question

the temperature of a mixture decreases at the rate 1° C per 30 minutes the temperature of the mixture at 3 o'clock was 5°c
a. At what time will be the temperature be 3° C below zero?

b. What will be the temperature of the mixture at 6 o'clock?

Answer 1

At 7 o'clock it will be 3℃ below zero
At 6 o'clock it will be 1℃ below zero
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