we are given
The scale is
[tex] \frac{1}{2} inch=3miles [/tex]
the distance from Happy Hill Park to Rainbow Valley Park is 4 1/2 inches
we can change it into rational form
and we get
[tex] =\frac{9}{2}inch [/tex]
so, we can multiply both sides by 9
[tex] 9*\frac{1}{2} inch=9*3miles [/tex]
now, we can simplify it
[tex] \frac{9}{2} inch=27 miles [/tex]
so, the actual distance between the two parks is 27 miles........Answer