Ophelia recorded the temperature of a cold store every two hours.
1. At 6am it was -4°C and at 8am it was -1°C. By how much did the temperature rise?
2. The temperature went up by 5°C in the next two hours. .What was the temperature at 10am?

Correct result:

t1 =  3 °C
t2 =  4 °C



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