Question 778032
Use the pythagorean theorem


a^2 + b^2 = c^2


15^2 + 8^2 = c^2


225 + 64 = c^2


289 = c^2


c^2 = 289


c = sqrt(289)


c = 17


So you are <font color="red">17 miles</font> from the starting point.