To determine how far David is from his car after walking 50 yards north and 56 yards east, we can use the Pythagorean theorem. David's path forms a right triangle where:
- One side (north) is 50 yards.
- The other side (east) is 56 yards.
The distance \( d \) from his car can be calculated using the formula:
\[ d = \sqrt{(50^2) + (56^2)} \]
Calculating the squares:
\[ 50^2 = 2500 \] \[ 56^2 = 3136 \]
Adding these values together:
\[ 2500 + 3136 = 5636 \]
Now, take the square root:
\[ d = \sqrt{5636} \approx 75.1 \]
So, rounding to the nearest tenth, David is approximately 75.1 yards away from his car.