Answer:
Chicago had 9 inches more snow.
Step-by-step explanation:
We have been given that in one year Detroit, Michigan, recorded 30.9 inches of snow and Chicago, Illinois, recorded 39.9 inches of snow.
To find the city with more snow, we will subtract 30.9 from 39.9.
[tex]\text{Difference between snow}=39.9-30.9[/tex]
[tex]\text{Difference between snow}=9[/tex]
Therefore, Chicago, Illinois had 9 inches more snow.
