Answer:
1inch : 3.9miles
Explanation:
Given that the distance between the museum which is 7.8miles apart is represented by 2inches, then;
7.8miles = 2inches
To get the scale used;
x = 1 inch
Divide both expressions
[tex]\begin{gathered} \frac{7.8}{x}=\frac{2}{1} \\ \end{gathered}[/tex]Cross multiply
[tex]\begin{gathered} 7.8\times1=2\times x \\ 7.8=2x \\ \text{Swap} \\ 2x=7.8 \end{gathered}[/tex]Divide both sides by 2
[tex]\begin{gathered} \frac{2x}{2}=\frac{7.8}{2} \\ x=3.9 \end{gathered}[/tex]Hence the scale used is 1inch : 3.9miles
