To find the straight-line distance from your starting point after driving the given path, you can use the Pythagorean theorem.
- Driving West: You drive 3 miles west.
- Turning Right (North): After that, you turn right and drive 11 miles north.
You have now formed a right triangle where:
- The horizontal leg (west) measures 3 miles.
- The vertical leg (north) measures 11 miles.
To find the straight-line distance from your starting point (the hypotenuse of the triangle), you can use the Pythagorean theorem:
\[ c = \sqrt{a^2 + b^2} \]
where \( a \) is one leg (3 miles), \( b \) is the other leg (11 miles), and \( c \) is the hypotenuse (the distance from the starting point).
Plugging in the values:
\[ c = \sqrt{3^2 + 11^2} \] \[ c = \sqrt{9 + 121} \] \[ c = \sqrt{130} \] \[ c \approx 11.4 \text{ miles} \text{ (rounded to the nearest tenth)} \]
Thus, the straight-line distance from your starting point is approximately \( \boxed{11.4} \) miles.