Hello!
To find the circumference, you multiply the diameter by pi. We will do so below.
2.5[tex] \pi [/tex]≈7.85
a. 7.85 feet
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To find how many rotations it will take to travel a mile, we will need to divide our mile by our circumference.
5,280/7.85≈672.61
b) 672.61
I hope this helps!
