The tire will rotate 280.12 times
Why?
To calculate how many times will the tire rotate, first, we need to convert from miles to inches using the following factor:
[tex]1mile=63360in\\\\0.5mile=31680in[/tex]
Now, calculating the circumference of the wheel, we have:
[tex]C=2*\pi *r=2*\pi *18in=113.1in[/tex]
Then, calculating how many times will the tire rotate, we have:
[tex]Revolutions=\frac{31680in}{113.1in}=280.12[/tex]
Hence, we have that the tire will rotate 280.12 times (280.12 revolutions).
Have a nice day!