Answer:
7 miles.
Step-by-step explanation:
We have to set up a ratio, where x is the actual distance in miles between Rose Lake and the hiking trail.
[tex]3.5 : 2 = x : 4[tex]
[tex]2x = 3.5 * 4[tex]
[tex]2x = 14[tex]
[tex]x = 7[tex]
The actual distance between Rose Lake and the hiking trail is 7 miles.