A 15foot flag pole is mounted on top of a 30 feet school building. A group of students have been assigned to calculate the angle of elevation to the top of the flagpole from a point 60 feet from the base of the building . Calculate the angle of elevation from them.

Two trains leave a station on different tracks. the tracks make an angle of 130°, with the station as a vertex. the first train travels 100 km and makes its first stop at point a, while the second train travels 200 km and makes it first stop at point b. how far apart are the trains when both are at their first stop? round the answer to the nearest integer. a) 65 km b) 139 km c) 224 km d) 275 km