the temperature at 12 noon was 10 degree Celsius above zero. If it decreases at the rate of 2 degree Celsius per hour until midnight, at what time would the temperature be 8 degree Celsius below zero? what would be the temperature at midnight?
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Answer:
10 + (n-1)×-2 = -8
(n-1)×-2 = -18
(n-1) = 9
n = 10
Therefore at 10:00 pm, the temperature will be -8°C
At midnight the temperature will be = -12°C
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