Answer:

Speed = 9 mile ÷ 1 hour .

Step-by-step explanation:

Given  : A squirrel ran 9 miles in 1 hour.

To find :  Which expression can be used to determine its speed in miles per hour.

Solution : We have given

Distance covered by squirrel : 9  miles.

Time covered = 1 hour .

Speed = frac{Distance}{time}.

Speed =  frac{9}{1} mile per hour.

Speed = 9 mile ÷ 1 hour .

Therefore, Speed = 9 mile ÷ 1 hour .