The speed formula is given by:
![v=(d)/(t)](https://img.qammunity.org/2023/formulas/mathematics/college/7bvf02ex7prlyl84jiizv8vikm7s8zddn1.png)
Where d is the distance traveled in t hours. From the problem, we know that:
![v=(260)/(4)=65\text{ mi/h}](https://img.qammunity.org/2023/formulas/mathematics/college/jsa5vxm6ep1iiwcovi7d3muhwe6nj1nl3e.png)
Using the speed formula, we can get the distance formula:
![d=v\cdot t](https://img.qammunity.org/2023/formulas/physics/college/ecte8ctuy6v0aaabxqa5wazl7pge8fwkb5.png)
Now, at this rate (v = 65 mi/h), the distance traveled in 6 hours is:
![d=65\cdot6=390\text{ mi}](https://img.qammunity.org/2023/formulas/mathematics/college/254e66xe435qynyp6qndq2ou5aosxcxohb.png)
She will travel 390 miles in 6 hours.