At night, the air temperature dropped by 2 ° C every hour. At midnight, the thermometer

At night, the air temperature dropped by 2 ° C every hour. At midnight, the thermometer showed + 2 ° С. What was the temperature at 2:30 am?

Midnight time is 12 am or 0 hours and 0 minutes.
Let’s find how much the temperature will drop in 2.5 hours if it was 2 ° C warm at midnight and every hour it drops by 2 ° C.
2, 5 hours * 2 ° C = 5 (° C) – the amount by which the temperature will change in 2 hours 30 minutes.
Now let’s find out what the temperature will be at 2 hours 30 minutes at night.
+ 2 ° C – 5 ° C = – 3 (° C).
Answer: -3 ° C.