Answer:
1cm : 1.2 miles
Step-by-step explanation:
Actual Distance from Haley's house to school = 3 miles
Map Distance from Haley's house to school = 2.5 cm
We want to determine a scale for the map by comparing their distances.
![\begin{gathered} 2.5\operatorname{cm}\text{ is represented by 3 miles} \\ \text{Therefore:} \\ 1\operatorname{cm}\text{ is represented by }(3)/(2.5)=1.2\text{ miles} \end{gathered}]()
The scale for the map is: 1cm represents 1.2 miles
We can put it simply as:
![1\operatorname{cm}\colon1.2\text{ miles}]()