Answer:
The circumference of Bob's new wheel is 81.7 inches
Explanation:
Circumference of a circle
The circumference of a circle of radius r is given by:
![C=2\pi r](https://img.qammunity.org/2021/formulas/mathematics/middle-school/mi4tnw17egix4j0slvrtb6r082cjra53zk.png)
The radius is half the diameter:
r = d / 2 = 26 / 2 = 13
r = 13 inch
Now calculate the circumference:
![C=2\cdot\pi\cdot 13](https://img.qammunity.org/2021/formulas/mathematics/high-school/np1ee6g6kz1cqbq88myb7njpuqwck24834.png)
Calculating:
![C=81.7\ inch](https://img.qammunity.org/2021/formulas/mathematics/high-school/1y0kmopf3cibyupej4jpp29pfx1z74qkk5.png)
The circumference of Bob's new wheel is 81.7 inches