Respuesta :

Answer:

-10 °C

Step-by-step explanation:

Subtract 90 from 80, since it dropped that much:

80 - 90

= -10

So, the temperature after it fell was -10 °C

Answer: -10 Celcius

Step-by-step explanation:

The tempature was 80 degrees and dropped by ninety, and since it dropped then you must subtract. 80 - 90 is -10 degrees Celcius. The temperature is -10 Celcius.