The temperature 21

The temperature on a cold winter's day in Canada was -4°C. It has increased by 6°C by midday. What was the midday temperature?

Correct answer:

t2 =  2 °C

Step-by-step explanation:

t1=4 °C Δ=6 °C  t2=t1+Δ=(4)+6=2°C

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