To approach a runway, a plane must be 7 degrees descent starting from a height of 3 miles above ground. To the nearest mile, how many mile from the runway is the airplane at the start of the approach?

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)