Final answer:
The percent error in Austin's estimate is approximately 6.9%.
Step-by-step explanation:
To find the percent error in Austin's estimate, we can use the formula:
Percent Error = (|Actual Value - Estimated Value| / Actual Value) * 100
Given that the actual distance is 14.5 mi and the estimated distance is 13.5 mi, we can plug these values into the formula:
Percent Error = (|14.5 - 13.5| / 14.5) * 100 = (1 / 14.5) * 100 ≈ 6.9%
Therefore, the per cent error in Austin's estimate is approximately 6.9%, which rounds to option A.