Solution:
Given:
The distance Wayne computed is;
![\begin{gathered} Ferris\text{ to Dunlap}=15mi \\ Dunlap\text{ to Butte}=20mi \\ Distance\text{ from Ferris to Butte through Dunlap}=15+20 \\ Distance\text{ from Ferris to Butte through Dunlap}=35mi \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/9vzwphtycazqx0m8a9dapfnvzst9zupgi4.png)
Therefore, the distance Wayne computed is 35 miles.
If Wayne travels directly from Ferris to Butte;
![\begin{gathered} The\text{ distance from Ferris to Butte directly is represented by }x \\ To\text{ get the distance, we use the Pythagorean theorem.} \\ x^2=15^2+20^2 \\ x^2=225+400 \\ x^2=625 \\ x=√(625) \\ x=25mi \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/1urdj868821bwl9xs7dhzsf96fz0eulrne.png)
Therefore, the distance if Wayne travels directly from Ferris to Butte is 25 miles.
The distance if Wayne travels directly is shorter than the distance Wayne found.
It is shorter by;
![35-25=10mi](https://img.qammunity.org/2023/formulas/mathematics/college/e0tr0u66jz0dlpd0s6lwwzloyz2ixoybn7.png)
Therefore, it is shorter by 10 miles if Wayne travels directly from Ferris to Butte.